Case Study Questions Class 7 Science Transportation in Animals and Plants

Case study questions class 7 science chapter 11 transportation in animals and plants.

CBSE Class 7 Case Study Questions Science Transportation in Animals and Plants. Important Case Study Questions for Class 7 Board Exam Students. Here we have arranged some Important Case Base Questions for students who are searching for Paragraph Based Questions Transportation in Animals and Plants.

CBSE Case Study Questions Class 7 Science Transportation in Animals and Plants

Case study 1.

Waste for removal from the body. Blood is composed of afluid, called plasma in which differenttypes of cells are suspended. One type of cells are the red bloodcells (RBC) which contain a red pigmentcalled Hemoglobin.

Que. 1) Which fluid flows in blood vessels?

(d) All of the above

Que. 3) What makes blood appear red in colour?

Que. 1) (c) Blood

Que. 5) Answer: oxygen is transported to all the parts of the body with the help of a carrier molecule called as haemoglobin.

Case study 2

Que. 1) How many types of blood vessels are present in the human body?

Que. 4) Answer: Arteries is the blood vessel which carry fresh oxygen from heart to all the parts of the body.

Case study 3

Que. 1) Which organs acts as a pump in the body to transport blood to all the different tissues, muscles and cells?

Que. 5) Answer: No the heart never get fatigued in the entire life time of a human.

Case study 4

Que. 3) In which side of the chest a person can feel his or her heart beat?

Que. 5) Answer: A doctor can judge condition of heart by listening to the heart beats of a person with the help of a stethoscope.

Case study 5

(d) Aquatic, Nitrate

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Case Study Questions for Class 7 Science Chapter 11 Transportation in Animals and Plants

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Here we are providing case study or passage-based questions for class 7 science chapter 11 Transportation in Animals and Plants .

Case Study/Passage Based Questions

Plants have pipe-like vessels made up of special cells, forming the vascular tissues, for transport of water and nutrients from the soil. These vascular tissues are called xylem. 1. _________are involved in transport of substances in plants? (a) Xylem (b) Phloem (c) Both of these (d) None of these 2. Vascular tissue for transport of water and nutrients in plants is called: (a) xylem (b) phloem (c) Both of these (d) None of these 3. Continuous network of channels that connects roots to the leaves through the stem and branches are: (a) root hair (b) xylem (c) phloem (d) All of these

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What is case study question for class 7 science.

Case study or passage-based questions in class 7 Science typically require students to read a given scenario or passage and answer questions based on the information provided. These questions assess students’ comprehension, analytical thinking, and application of scientific concepts. 

Best Ways to Prepare for Case Study Questions

To develop a strong command on class 6 Science case study questions, you can follow these steps:

  • Read the textbook and study materials:  Familiarize yourself with the concepts and topics covered in your class 6 Science curriculum. Read the textbook thoroughly and take notes on important information.
  • Practice analyzing case studies:  Look for case studies or passages related to class 6 Science topics. Analyze the given information, identify key details, and understand the context of the situation.
  • Develop comprehension skills:  Focus on improving your reading comprehension skills. Practice reading passages or articles and try to summarize the main points or extract relevant information. Pay attention to details, vocabulary, and the overall structure of the passage.
  • Understand scientific concepts:  Ensure that you have a solid understanding of the scientific concepts discussed in class. Review the fundamental principles and theories related to each topic.
  • Make connections:  Try to connect the information provided in the case study to the concepts you have learned in class. Identify any cause-effect relationships, patterns, or relevant scientific principles that apply to the situation.
  • Practice critical thinking:  Develop your critical thinking skills by analyzing and evaluating the information given in the case study. Think logically, consider multiple perspectives, and draw conclusions based on the evidence provided.
  • Solve practice questions:  Look for practice questions or sample case study questions specifically designed for class 6 Science. Solve these questions to apply your knowledge, practice your analytical skills, and familiarize yourself with the format of case study questions.
  • Seek clarification:  If you come across any challenging concepts or have doubts, don’t hesitate to ask your teacher for clarification. Understanding the underlying principles will help you tackle case study questions effectively.

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Transportation in Animals and Plants CBSE Class 7 Science Revision Notes Chapter 11

Why plants and animals need a transportation system.

We know that all living organisms like plants and animals need food, oxygen and water so that they can survive.

These elements need to be delivered to their body parts so that they can function properly.

Hence, all living organisms need a transport system in their bodies.

Human Circulatory System

Figure 1 Human Circulatory System

Figure 1 Human Circulatory System

The circulatory system is a transport system of the human body which consists of a network that supplies food, water, oxygen and other substances throughout the body.

The main parts of the circulatory system are:

Blood Vessels

Blood is a red colour fluid that flows in our body through the blood vessels.

Functions of blood:

The blood acts as the medium of transportation of essential substances throughout our bodies such as oxygen and nutrients. Blood carries oxygen from the lungs and transports it to different cells of the body.

The blood also carries waste material to the kidneys which then filters the blood. The small intestine digests the food and absorbs its nutrients. These nutrients are provided to all the parts of the body through blood.

The blood also protects the body from losing blood by forming a blood clot at the place of injury.

The blood contains a special substance that helps in regulating the temperature of the body.

Components of blood - Blood can perform several functions because of different substances present in it.

Blood plasma – the liquid substance present in the blood is called blood plasma. Almost 55% of the blood is blood plasma. The plasma facilitates the transportation of different substances throughout the body. The blood plasma is made up of water, salt, fats, proteins and sugar.

Red blood cells (Erythrocytes) – They are present in ample amount in the blood (40% to 45%). They are red in colour because they contain a special pigment called haemoglobin. The oxygen we take in binds itself with the haemoglobin and hence reaches every cell of the body through the blood.

White blood cells (Leukocytes) – They are present in fewer amounts (almost 1%) but perform a vital function in the body. These cells fight against the germs present in the body.

Blood platelets – These are the cells that help in the formation of a blood clot and prevent the blood from flowing out of the body due to an injury.

Figure 2 Components of blood

Figure 2 Components of blood

Our body contains tube-like structures called the blood vessels that help in the transportation of blood throughout our body. Our body contains two types of blood vessels based on the function that they perform:

These blood vessels carry blood from the heart that contains oxygen into different parts of the body.

These blood vessels carry blood that is rich in Carbon dioxide from the body organs to the heart.

Arteries have thick walls as the blood pressure is quite high in these blood vessels.

Veins do not have thick walls as the blood pressure is quite low in them.

They are narrow so that the blood can flow quickly through them.

They are slightly wider than the arteries.

They do not contain valves as the blood in arteries always flows in the right direction due to the pumping of the heart.

They contain valves that prevent blood from flowing in opposite direction.

We know that the heart pumps the blood in the arteries. This continuous pumping of blood in the arteries results in their rhythmic throbbing which is called Pulse.

Pulse rate is defined as the number of pulse beats per minute. The normal pulse rate of human beings is 70 to 80 beats per minute.

Figure 3 Checking the Pulse Rate

Figure 3 Checking the Pulse Rate

Pulmonary Artery

The pulmonary artery is a special blood vessel that connects the heart to the lungs. It takes blood that contains less oxygen (deoxygenated blood) from the heart to the lungs. Hence, it is unlike all other arteries that carry oxygen-rich blood.

Pulmonary Vein

The Pulmonary vein is a special blood vessel that connects the lungs and the heart. It carries oxygen-rich blood from the lungs to the heart. Hence, it is unlike all other veins that carry oxygen-less blood.

Capillaries

Small blood vessels are called capillaries. The arteries divide themselves into capillaries which then deliver oxygenated blood to the tissues in the body. Then these capillaries take up the deoxygenated blood from the tissues to the veins.

Figure 4 How Blood Circulates

Figure 4 How Blood Circulates

The heart is an organ present in our body that pumps the blood in the blood vessels.

It is located in the chest cavity.

Its lower part is a little tilted towards the left.

The heart is divided into four chambers with prevents the oxygen-rich blood from mixing with carbon dioxide-rich blood.

The Atria or upper chambers contain the blood with no oxygen.

The Ventricles or the lower chamber of the heart contains oxygen-rich blood.

The Atria and Ventricles both are individually divided within themselves into two chambers with the help up of valves.

From the left ventricle, the biggest artery of our body called aorta begins.

The right Atrium of the body receives deoxygenated blood from the body through a vein called Vena cava. Vena cava is the largest vein of our body.

Figure 5 Heart

Figure 5 Heart

Flow of Blood in Human Body

Flow of Blood in Human Body

The muscles of the heart relax and contract continuously as it pumps the blood in the arteries. This rhythmic contraction and relaxation of the heart is called a heartbeat.

The stethoscope is an instrument that is used to listen to the Heartbeat of a person. It amplifies the Heartbeat so that the doctors can monitor it and find out about the patient's condition.

It contains two earpieces, a tube that connects them to a chest piece comprising of a sensitive diaphragm.

Figure 6 Stethoscope

Figure 6 Stethoscope

Do all animals possess a circulatory system?

No, animals like Hydra and Sponges do not possess a circulatory system.

These animals live in water and hence get food and oxygen from the water as it enters their bodies.

As the water comes out of their bodies, it takes away the carbon dioxide and waste materials out of it.

Excretion in Animals

The cells in animals release some waste products as they perform different functions.

These waste products are toxic and hence they must be removed from the bodies of the living organisms.

The process of removal of waste products produced in the cells of the living organisms is called Excretion.

The Excretory System in Human Beings

Figure 7 The Excretory System

Figure 7 The Excretory System

The excretory system is a system of organs in living organisms that undergo excretion. The excretory system consists of different organs:

Kidneys – there are two organs called Kidneys present in our body. These Kidneys contain blood capillaries that filter out the unwanted substances from the blood in the form of urine.

Urinary bladder – The urine produced by the Kidneys is stored in a bladder called urinary bladder.

Ureters – There are two tube-like structures which connect the Kidneys and the urinary bladder together. They allow passage of urine from the kidney to the bladder.

Urethra – There is a muscular tube through which the urine moves out of the body.

Different organisms excrete different wastes:

The major excretory product in humans is urea. The urine consists of toxic wastes (2.5%), urea (2.5%) and water (95%).

The way in which waste chemicals are removed from the body of the animal depends on the availability of water. Fishes and aquatic animals excrete ammonia in the water.

Birds, Snakes and lizards excrete semi-solid, white coloured uric acid.

Dialysis – Sometimes people use artificial Kidneys, that is, they get the blood purified artificially periodically. It is called dialysis. They have to do so in a case of Kidney failure in which the Kidneys of a person are unable to perform their function due to an infection or an injury.

How is sweat useful to us?

Sweat contains water and some salts and hence help in getting rid of toxic wastes from the body.

Also, as the sweat evaporates from our skin, it takes up our body heat and this makes us feel cool, especially during the summer days.

Transportation in Plants

Transportation of water and minerals.

The roots of the plants absorb the essential minerals and water from the soil.

The roots have hair like structures present on them.

These hairs increase the surface area of the roots and hence allow more amount of absorption.

Figure 8 Absorption by Roots

Figure 8 Absorption by Roots

From the roots, the water and minerals are transported to other parts of the plant through special kind of tissues called vascular tissues. There are two vascular tissues present in the plants:

Xylem – It is a vascular tissue that is responsible for transporting nutrients and water in the plants. The root cells absorb water and minerals and transport it to xylem. Xylem carries it to other parts unidirectionally without usage of energy.

Phloem – It is a vascular tissue that transports the food produced by the leaves (source) to all parts of the plant (sink) . This flow is bidirectional and utilizes energy. This is known as translocation.

Figure 9 Transportation by Xylem and Phloem

Figure 9 Transportation by Xylem and Phloem

Transpiration

Sometimes not all the water that plants absorb is used by them.

Hence they need to get rid of the excess water in them.

This loss of water in plants takes place through the process of transpiration in which the water evaporates in the atmosphere through the stomata present on the leaves.

Stomata are tiny pores present on the leaves that allow the movement of gases and water through them.

Transpiration results in absorption of water : As the water from the leaves evaporates, it generates a suction pull in the plants that bring the water from the roots upwards.

Transpiration helps in cooling down the plants : As the water evaporates, it utilizes the heat of the pant and results in cooling of the internal temperature of the plant.

Figure 10 Transpiration

Figure 10 Transpiration

Figure 11 Removal of Water through Stomata

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Important Questions for CBSE Class 7 Science Chapter 11 - Transportation in Animals and Plants

  • Class 7 Important Question
  • Chapter 11: Transportation In Animals And Plants

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CBSE Class 7 Science Chapter-11 Important Questions - Free PDF Download

To help the students while their exam preparations and to get the important topics easily without any struggle subject experts at Vedantu with a lot of research created Important Questions For Class 7 Science Chapter 11. Vedantu is the platform that provides all kinds of study material for free and the students can directly access the solutions by downloading the PDFs that are available on the platform. The important topics covered are the circulatory system, excretory system, and transportation in plants. All the content is created based on the guidelines provided by the CBSE.

Vedantu is a platform that provides free CBSE Solutions (NCERT) and other study materials for students. Register Online for NCERT Solutions Class 7 Science and Class 7 Maths tuition on Vedantu.com to score more marks in CBSE board examination.

Study Important Questions for Class 7 Science Chapter 11 – Transportation in Animals and Plants

Very Short Answer Questions: 1 mark

Multiple Choice Questions:

1. The circulatory fluid in humans is 

a) Blood b) Urine c) Water d) Oil

Ans:  a) Blood

2. The fluid portion of the blood is called as 

a) Erythrocyte b) Xylem c) Platelets d) Plasma

Ans: d) Plasma

3. The oxygen-carrying component is called 

a) RBC b) WBC c) Platelets d) Plasma

Ans: a) RBC

4. The function of the platelets is 

a) Transport of oxygen

b) Immunity 

c) Clotting 

d) Transport of carbon dioxide

Ans: c) Clotting

5. Waste products in blood are filtered by 

a) Heart b) Lungs c) Uterus d) Kidneys

Ans: d) Kidneys

6. Water carrying tissue in plants is 

a) Xylem b) Phloem c) Veins d) Roots

Ans: a) Xylem

7. Food transporting tissue in plants is 

Ans: b) Phloem

8. Transpiration occurs through 

a) Stomata b) Roots c) Lungs d) Blood

Ans: a) Stomata

9. Transpiration is a means 

a) To cool plant body 

b) to absorb water from the soil 

c) both a and b 

d) neither a nor b

Ans: c) Both a and b

10. The circulatory fluid in sponges is 

Ans: c) Water

Short Answer Questions: 3 marks

11. What is the role of blood in the body?

Ans: Blood is the body’s circulatory fluid and is in charge of transporting substances. The following is a list of the functions of blood in our bodies:

Transports oxygen to all cells of the body.

It removes carbon dioxide from the body’s cells.

Transports nutrients to all cells of the body.

Removes waste from the cells of the body.

Provides the body with immunity due to the presence of WBC.

Helps in maintaining body temperature.

12. Explain the components of the circulatory system in humans

Ans: Heart, blood, and blood arteries make up the circulatory system in our bodies.

Heart: It is a muscular organ located in the center of the chest. It is in charge of pumping blood into blood vessels for transportation throughout the body.

Blood: Blood is a type of fluid tissue that transports substances throughout the body. It is made up of plasma and blood cells. Red blood cells (erythrocytes), white blood cells (leucocytes), and platelets are the three types of blood cells. Each has a distinct purpose in the body.

Blood Vessels: Blood is carried through these tube-like structures. Arteries, veins, and capillaries are the three types of blood vessels.

13. How does transport occur in sponges?

Ans: Transportation in sponges occurs with the help of water. Sponges are aquatic animals. They are always surrounded by water. They do not possess any specific tissue or organ for transportation. Water enters their body through numerous pores present on their body surface and helps in the exchange of materials in the body along with the removal of waste.

14. What is transpiration? Explain its importance.

Ans: Evaporation of water from the aerial regions of plants, such as leaves, is known as transpiration. It happens through tiny pores present underside of the leaf surface known as stomata. Roles of transpiration in plants are as follows:

Transpiration cools down the overall temperature of the plant.

Transpiration creates a suction pull which helps in absorption from the soil with help of roots.

It also helps in the removal of waste from plants that are dissolved in water.

15. Explain how wastes are removed from the body

Ans: Excretion is the process of removing nitrogenous wastes from the human body. The excretory system is a specialized organ system in the human body that is responsible for elimination. The excretory system consists of a pair of kidneys, a pair of ureters, a urinary bladder, and a urethra. The wastes in the blood are filtered by the kidneys, which then form urine. The ureters transfer the urine produced by each kidney to the urinary bladder, where it is held until it can be excreted by the urethra.

Long Answer Questions: 5 marks

16. Explain the structure of the heart with a diagram.

Structure of the Heart

The human heart is divided into four chambers. The upper two upper chambers are known as atria and the ventricles are the two lower chambers. The heart is divided into right and left sides. A septum separates the right and left sides completely and prevents the mixing of oxygenated blood with deoxygenated blood.

Valves separate the atria and ventricles, preventing blood from flowing backward.

17. How does the transport of food and water occur in plants?

Ans: Plants lack specialized organs and organ systems for substance transportation. Instead, they have specialized tissues for this purpose. A tissue is a collection of cells that share a common purpose. Xylem and Phloem are two vascular tissues responsible for the transportation of water and food in plants.

Xylem is a tissue that looks like a tube or a vessel but has no cross walls. This is responsible for moving water from the roots to the leaves. The suction force provided by transpiration pull is required for water movement. The loss of water from the aerial regions of plants is known as transpiration.

18. What are blood vessels? Compare the different blood vessels.

Ans: The tubes or conduits via which blood is delivered to bodily tissues are known as blood vessels.

Arteries

Veins

Capillaries

Carry blood away from the heart to different body parts.

Collect blood from all parts of the body and bring it back to the heart.

Site of exchange of different substances between blood and tissues.

Carry oxygenated blood except for pulmonary arteries.

Carry deoxygenated blood except for pulmonary veins.

Carry both oxygenated and deoxygenated blood.

Walls: Thick

Walls: Thin

Walls: Thin

Valves: Absent

Valves: Present

Valves: Absent

Blood Pressure is high.

Blood Pressure is low.

Blood Pressure is high.

Transportation in Plants and Animals Class 7- Important Questions

Transportation in plants and animals talks about how food and other materials are transported inside the body. Along with this, it also provides knowledge about various transportation systems in the animal body and plants. 

Important Questions on Transportation in Plants And Animals Class 7

The important topics covered in transportation in plants and animals are mentioned below. 

Circulatory System

This organ system of the body is responsible for the transportation of certain important materials in the body. 

The materials transported include carbon dioxide, cells, nutrients, etc. 

The transportation of materials in the body takes place through the blood. 

The primary parts of the circulatory system are:

Heart, veins, and arteries.

The Main Parts of The Circulatory System of The Human Body Include

Blood: .

It is the red colour fluid flowing through the blood vessels in the body. It acts as the transportation medium for essential substances in the body, including oxygen and nutrients. The components of blood are:

Blood plasma

Red blood cells (RBCs)

White blood cells (WBCs)

Blood platelets

Blood Vessels

These are the tube-like structures present in the body, which are responsible for blood transportation. There are mainly two types of blood vessels in the body. These are differentiated on the basis of the functions they perform. These are:

Arteries: These blood vessels carry the blood rich in oxygen from the heart to various body parts. 

Veins: These blood vessels carry the blood rich in carbon dioxide from the various body parts to the heart. 

Heart: 

This is the most important organ of the body, responsible for pumping blood. It is located in the chest cavity.

Excretory System

Excretion is the process through which waste products of the body are removed from the cells in living organisms. In human beings, excreta is in the form of carbon dioxide, faeces, and urine. 

The Parts of The Excretory System Include

There are two kidneys present in the human body. These are responsible for filtering out the unwanted substances from the body. 

These are the tube-like structures connecting the urinary bladder and kidney together. They allow the urine to pass from the kidney to the bladder. 

Urinary Bladder

The urine is stored in the urinary bladder. 

The urine moves out of the body through this muscular tube. 

Transportation in Plants

The transportation of materials in plants takes place through the process of osmosis. It is the movement of solvent molecules in plants from a lower solute concentration region to the higher solute concentration region through a semipermeable membrane. 

The Various Parts of Plants Through Which Transpiration Takes Place Includes

Root hair: These are responsible for increasing the surface area of plants for absorption. 

Phloem: This tissue transports food produced by leaves to all parts of the plant. 

Xylem: This tissue is responsible for the transportation of water and nutrients in the plants. 

Transpiration: Under this process, loss of excess water takes place from the leaves of the plants. 

Transportation in Plants And Animals Class 7 Important Questions

1. Where is the heart located?

The heart is located in the chest cavity where the lower tip of the heart is slightly tilted towards the left. 

2. What is hemoglobin?

It is the red colored pigment present in red blood cells that carry oxygen with it for transportation. 

3. How many blood groups is the human blood divided into?

The human blood is divided mainly into four groups, namely, A, B, O, and AB. 

4. What is blood?

Blood is a fluid tissue (also called connective tissue) that performs the task of transportation of nutrients and oxygen to the cells and taking away carbon dioxide and waste products. 

The fluid part present in the blood is called plasma, and several nutrients and salts are dissolved in it. 

The Various Blood Cells Suspended In Plasma Are

Red blood cells (RBC)

White blood cells (WBC)

5. What are blood platelets?

Blood platelets are the smallest cells present in the blood. When clumped together, they lead to forming blood clots, which helps in the prevention of blood loss in case of bleeding. Also, in case of an injury, they prevent excessive damage by binding together at the damage site. 

6. What is the pulmonary circuit?

The pulmonary circuit is defined as the network of arteries and veins which connect the heart and lungs. The deoxygenated blood is carried from the blood to the lungs for oxygenation. This oxygenated blood further returns to the heart and is pumped throughout the body. 

7. What are kidneys?

Kidneys are the main excretory organ of the human body which are bean-shaped and reddish in colour. On each of the spine, there is a kidney present.

The kidney contains millions of tiny tubules that act as microscopic filters, filtering out harmful substances from the blood. 

These harmful substances are removed from the body in a dissolved state through urine. 

Thus, kidneys are like filters for our body. 

8. What is transpiration?

Transpiration is defined as the loss of water from plants in the form of water vapour through the stomata which are present on leaves.

This process of transpiration also helps in the absorption and distribution of water through the plant’s roots. Transpiration exerts a straw-like effect on the plants leading to water moving up against the gravity in tubes. These tubes are formed of xylem cells.

Why are Important Questions fr Class 7 Science Chapter 11 - Transportation in Animals and Plants  necessary?

Focus on key topics for efficient studying.

Prepares students for exams and reduces anxiety.

Reinforces understanding of fundamental concepts.

Teaches effective time management.

Enables self-assessment and progress tracking.

Strategic approach for higher scores.

Covers a wide range of topics for comprehensive understanding.

Supports exam preparation and boosts confidence.

Referring to the Class 7 Science Chapter 11 Extra Questions help students to increase their confidence during the exam preparation and it is one of the best study materials that can be used for free. All these topics are important not only from the exam point of view but also provides knowledge about the basic topics which we will use often in future studies and in our daily life. Having knowledge of Class 7 Science Chapter 11 Extra Questions will help the students to solve the tricky questions in an easy manner.

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FAQs on Important Questions for CBSE Class 7 Science Chapter 11 - Transportation in Animals and Plants

1. What is the importance of transportation explained in Chapter 11 of Class 7 Science?

Transportation is important in living beings as it helps eliminate waste products from the body. Both in plants and animals, transportation helps to circulate essential nutrients, water, gases, and excretory products. Every cell in the living organism needs energy. The complex food molecules are broken down into simpler molecules and absorbed by the cells. Our body has a special transportation system that transports oxygen throughout the body and removes carbon dioxide. Likewise, in plants, transportation of materials takes place through a complex transportation system.

2. Why does the bleeding stop after a while?

When you get injured or have a cut on your body, bleeding occurs. It stops due to the clot formation in the blood. This process of clot formation is referred to as coagulation. During this process, platelets release some special protein molecules that help hold the blood cells firmly. 

3. Write the definition of transportation. 

Transportation is the process of the movement of molecules and ions through the cell membrane or bloodstream. In simple terms, transportation means carrying molecules from one place to another. Every organism requires oxygen and nutrients to conduct important life processes. Also, waste products produced inside the body need to be removed. Thus, the term transportation can be defined as a biological process in which essential nutrients are absorbed by specific organs and transported to other body organs.

4. Why is the transport of materials necessary in a plant or an animal?

Transportation of materials is necessary both in plants and animals because it helps them to grow properly. This process helps to carry out significant life processes. As every cell requires essential nutrients for proper growth and development, this biological process transports nutrients, water, and gases from one part of the body to another. Thus, transportation of materials is necessary. 

5. How is transportation in plants different from that of transportation in animals?

In plants, the process of transportation occurs through vascular tissues that are the xylem and phloem. Xylem helps to transport water and minerals in plants and phloem helps in the transportation of food molecules. On the contrary, in animals, the process of transportation takes place through the circulatory system. The circulatory system helps to distribute nutrients to the other cells of the body. However, the waste materials are removed from the body through the excretory system.

Chapterwise Important Questions for CBSE Class 7 Science

Cbse study materials.

case study on transportation in animals and plants class 7

Transportations in Animals and Plants Important Questions Class 7 Science Chapter 11

Transportations in Animals and Plants Class 7 Science Chapter 11 Important Questions and Answers are provided here. We prepared these extra questions based on the latest NCERT Class 7 Science Book. These important questions will help you to properly understand a particular concept of the chapter. Practicing class 7 important questions before the exam will help you to get excellent marks in the exam. 

Class 7 Science Chapter 11 Transportations in Animals and Plants Important Questions

Very short answer type question.

1: Circulatory system consists of the heart, blood vessels and _____________.

Answer:   Blood.

2: Name the system in the body responsible for removal of unwanted harmful substances and excess water in the body cells.

Answer:   Excretory system

3: Name the fluid part of blood.

Answer:   Plasma

4: Name the three types of cells present in blood.

Answer:   White blood cell, red blood cell and platelets

5: Red blood cells, also called RBCs, have iron pigments known as _____________.

Answer:   Haemoglobin

6: The presence of haemoglobin gives red colour to blood. True/ False.

Answer:   True

7: White blood cells, or WBCs, defend the body against ___________________.

Answer:   Infection

8: When a blood vessel is cut, blood comes out immediately. After some time, a dark red clot is formed on the cut. Name the cell responsible for this.

Answer:   Platelets

9: Name the two types of blood vessels

Answer:   Arteries and vein

10: Which of the two carry oxygen rich blood, arteries or vein?

Answer:   Arteries 

11: A number of capillaries together form a ___________

Answer:   Vein

12: Where is heart located in human body?

Answer:   Heart is located in the chest cavity with its lower parts towards the left.

13: Name the vein in the body that carries oxygen-rich blood.

Answer:   pulmonary vein

14: Pulmonary artery, the only artery in the human body that carries carbon dioxide-rich blood. True/ False.

15: What is heart beat?

Answer:   The muscles of the heart contract and relax, which constitutes a heartbeat.

16: What is pulse?

Answer:   Throbbing that occurs in arteries due to flowing of blood is called pulse or the flow of blood in an artery over a bone is called the pulse.

17: What is removed along with water as sweat?

Answer:   Extra salts are removed along with water as sweat.

18: What is the function of valves present in veins?

Answer:   Valves are present in veins to prevent backflow of blood in tissues.

19: Name the term for transport of food from leaves to other parts of plants

Answer:   Translocation

20: Name the type of blood vessels which carry blood from organs to the heart.

Answer:   Veins

21: Name the waste products formed in body.

Answer:   Urea, uric acid and excess water.

22: Define excretion.

Answer:   The removal of waste products is termed excretion.

23: Name organs of excretory system.

Answer:   Kidneys, the ureters, the urinary bladder and the urethra.

24: Sweat makes the body warm and it helps to maintain normal temperature. True/ False

Answer:   False

25: What is osmoregulation?

Answer:   Osmoregulation is the regulating osmotic pressure of the body fluids by controlling amount of water and salts in the body.

26: Heart pumps carbon-dioxide rich blood to ______________ and oxygen rich blood to rest of the __________.

Answer:   Lungs and body

27: The roots of the plants remain in contact with underground water. True/ False

28: What does the xylem transport?

Answer:   Xylem-water and minerals

29: What does the phloem transport in plants?

Answer:   Phloem- prepared food.

30: Vena cava transport oxygenated blood or deoxygenated blood?

Answer:   deoxygenated blood

31: Transpiration process help in eliminating extra water from plants.True/ False

32: Arteries and veins are joined by a network of ___________________.

Answer:   Capillaries

33: Kidney eliminates the waste material in the liquid form called as__________________.

Answer:   Urine

34: Name the main excretory product in human being.

Answer:   Urea

35: Name the instrument used to measure blood pressure.

Answer:   Sphygmomanometer

Short Answer Type Questions

1: What do you mean by dialysis? Explain.

Answer:   Dialysis is an artificial process of getting rid of waste and unwanted water from the blood by dialysis machines. Dialysis machines contain a tank with solution of water glucose and salt. Patient’s blood allowed passing through solution for removal of waste. The cleaned blood pumped to vein. The dialysis continues till all blood has been purified.

2: Write the two functions of kidneys.

Answer:   The two functions of kidney are excretion and osmoregulation. Excretion is the elimination of metabolic waste products from the body. Osmoregulation is regulating osmotic pressure of the body fluids by controlling the amount of water and salts in the body.

3: State one function of the following:

  • Capillaries

Answer:   Arteries- carry blood from heart to different parts of body

Veins-carry blood from different parts of body to the heart.

Capillaries-exchange of material between blood and surrounding cells.

4: Why is heart known as the pumping organ of the human body?

Answer:   Heart is the pumping organs of a human body as it continuously act as a pump for transporting blood to all body parts. Heart pumps carbon-dioxide rich blood to lungs and oxygen rich blood to rest of the body.

5: What is the significance of dividing heart into different chambers?

Answer:   The division of heart into different chambers ensures that there is no intermixing of oxygenated and deoxygenated blood. This ensures a better efficiency of circulation and transportation of oxygen.

6: Explain pulse and pulse rate.

Answer:   When blood flows in arteries, it gives throbbing sensation in arteries. This throbbing sensation is known as a pulse. The rate of heart beat or throbbing is known as pulse rate. A person has a pulse rate between 72 to 80 beats per minute. A stethoscope is an instrument used to measure the sound heartbeat.

7: Why walls of veins are thinner than the walls of arteries?

Answer:   Veins do not have thick walls because blood in vein is no longer under pressure but blood emerges from the heart is under high pressure. So arteries have thick walls.

8: How do plants absorb water and minerals from soil?

Answer:   Plants absorb water and minerals from soil by the roots. The root hair absorbs water and dissolved mineral nutrients from the soil. The roots remain in contact with underground water.

9: Differentiate between arteries and veins.

Answer:  

These vessels carry blood from the heart to various body parts.These vessels carry blood from the various parts to the heart.
Carry oxygenated blood from the heart except the pulmonary artery. Carry deoxygenated blood from the body parts except the pulmonary vein.
 Blood flows under high pressure. Blood flows under low pressure.
 Absence of valves. Valves are present to prevent the backward flow of blood.

10: Differentiate between atrium and Ventricle.

   
They are the upper chambers of heartThey are the lower chambers of heart.
They receive blood from various body partsThey are thin walled They are thick walled

11: Why do sponges and hydra not have blood?

Answer:   Animals such as sponges and hydra do not possess any circulatory system. The water in which they live brings food and oxygen as it enter their body the water carries away waste materials and carbon dioxide as it moves out.

12: Enlist the functions of blood.

  • It transports substances like digested food from the small intestine to the other parts.
  • It carries oxygen and carbon dioxide to their respective organs and tissues
  • It transports wastes for removal from the body.

13: Differentiate between xylem and phloem.

   
It transports water and mineralsIt transports food
It has unidirectional movement.It has multidirectional movement

14: Differentiate between RBC and WBC.

   
They are red in colourThey are colourless
They help in transport of gasesThey help in fighting against germs and infection
They have haemoglobinThey lack haemoglobin

15: Why is blood needed by all the parts of the body?

Answer:   The blood is needed by all parts of the body because it transports substances like digested food from the small intestine to the other parts of the body. It carries oxygen from the lungs to the cells of the body. It also transports waste for removal from the body.

16: Why blood is red in colour?

Answer:   The presence of haemoglobin makes blood appear red. Haemoglobin bind with oxygen and transports it to all the parts of the body and ultimately to all the cells. It will be difficult to provide oxygen efficiently to all the cells of the body without haemoglobin.

17: Why is it necessary to excrete waste products?

Answer:   When our cells perform their functions, certain waste products are released. These waste products are toxic and hence need to be removed from the body. The process of removal of wastes produced in the cells of the living organisms is called excretion.

18: What is heartbeat? Name the instrument used to provide information about heartbeat.

Answer:   One complete contraction and relaxation of heart makes one heartbeat. Electrocardiogram (ECG) is used to check the rhythm of heartbeat.

19: Sometimes doctor inject medicines directly in our bloodstream, where do they inject in artery or in vein?

Answer:   doctor inject medicines in vein because veins are superficial and are easily locatable, secondly medicines need to be transported to all parts of the body through vein medicines reaches heart and from heart it is pumped to all part of body.

20: Explain the role of platelets in blood clotting.

Answer:   The platelets are responsible for formation of clot in blood when it comes in contact with air. So this prevents excess bleeding from the injury as it plugs the skin opening by clout formation on it. If there are no platelets in the blood, then we may die from a small injury due to excess bleeding as there will be no clotting to plug it.

Long Answer Type Questions

1: What is the function of RBCs?

Answer:   Red Blood Cells (RBCs) contain a red pigment called haemoglobin. Haemoglobin bind with oxygen and transports it to all the parts of the body and ultimately to all the cells. It will be difficult to provide oxygen efficiently to all the cells of the body without haemoglobin. The presence of haemoglobin makes blood appear red.

2: Does transpiration serve any useful function in the plants? Explain.

Answer:   Plants absorb mineral nutrients and water from the soil. Not all the water absorbed is utilised by the plant. The water evaporates through the stomata present on the surface of the leaves by the process of transpiration. The evaporation of water from leaves generates a suction pull which can pull water to great heights in the tall trees. Transpiration also cools the plant.

3: Explain stomata and its function in plants.

Answer:   Stomata are tiny pores present on the surface of the leaves. These pores are surrounded by ‘guard cells’. Following are its function in plants:

  • The carbon dioxide required in the process of photosynthesis is made available by Stomata, through direct absorption from the air.
  • Stomata help Plants in absorption of mineral nutrients and water from the soil. Not all the water absorbed is utilised by the plant. The water evaporates through the stomata present on the surface of the leaves by the process of transpiration. The evaporation of water from leaves generates a suction pull which can pull water to great heights in the tall trees. Transpiration also cools the plant.

4: What will happen if there are no platelets in the blood?

Answer:   The platelets are another type of cells in blood, which are responsible for formation of clot in blood when it comes in contact with air. So this prevents excess bleeding from the injury as it plugs the skin opening by clout formation on it. If there are no platelets in the blood, then we may die from a small injury due to excess blooding as there will be no clotting to plug it.

5: What is the significance of transport of materials in plants and animals?

Answer:   Transport of materials is very important in plant or in animals as all organisms need food, nutrition, water and oxygen for survival. The food is the source of energy and every cell of an organism gets energy by the breakdown of glucose. The cells use this energy to carry out vital activities of life. Therefore food must be made available to every cell of an organism. They need to transport all these to various parts of their body. Further, animals need to transport wastes to parts from where they can be removed.

6: Briefly describes the human circulatory system?

Answer:   The circulatory system is made up of the Blood vessels, heart and Blood that help and control the flow of the blood around the body. Heart pumps blood around your body by alternate systole and diastole. Blood is the connective tissue that carries food, air, waste product and hormones. it contain fluid medium called plasma and three types of cell RBC, WBC and Platelets. There are three distinct types of blood vessels, namely, arteries, veins and capillaries circulate blood around body.

7: Explain form and function of urinary system in man?

8: Describe the functioning of excretory system.

Answer:   The cells in the body perform various activities. Waste products such as urea, uric acid and excess water are formed and have to be removed from the body. The removal of waste products is termed excretion. The organs that help in the process of excretion constitute the excretory system, and include the kidneys, the ureters, the urinary bladder and the urethra. The useful and harmful substances in blood enter the kidneys, where the capillaries filter it. The useful substances are reabsorbed, but the harmful substances are removed along with water in the form of urine. The urine from the kidneys comes down through long tubes called the ureters, which open into the urinary bladder where the urine is stored temporarily. When the bladder fills, the urine is disposed.

9: Explain the function and components of blood.

Answer:   The main components of bloods are:

  • Plasma: The fluid part of the blood is called plasma.
  • Red Blood Cells (RBC) contains a red pigment called haemoglobin. Haemoglobin bind with oxygen and transports it to all the parts of the body and ultimately to all the cells. It will be difficult to provide oxygen efficiently to all the cells of the body without haemoglobin. The presence of haemoglobin makes blood appear red.
  • White Blood cells (WBC) fight against germs that may enter our body thus provide an effective defence against infection, disease etc.
  • Platelets: They are another type of cells in blood, responsible for the formation of dark red clot in the blood when it comes in contact with air. They help in preventing excess bleeding from the injuries by plugging the skin openings or cuts with a thick dark red clot

NCERT Solutions for Class 7 Science Chapter 7 Transportation in Animals and Plants

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  • 7th June 2023

NCERT Solutions Class 7 Science Chapter 7 Transportation in Animals and Plants is provided here to help students in understanding the topic thoroughly. All these solutions are solved by experts with a detailed explanation. Class 7 NCERT Solutions for Science Chapter 7 includes all the textbook exercise questions and answers. These solutions will help students complete their assignments & homework.

Class 7 Science Transportation in Animals and Plants Questions and Answers

Exercise Questions

Question 1:  Match structures given in Column I with functions given in Column II.

(i) Stomata(b) Transpiration
(ii) Xylem(d) Transport of water
(iii) Root hairs(a) Absorption of water
(iv) Phloem(c) Transport of food

Question 2: Fill in the blanks.

(i) The blood from the heart is transported to all parts of the body by the _____________ (ii) Haemoglobin is present in ___________ cells. (iii) Arteries and veins are joined by a network of ___________ . (iv) The rhythmic expansion and contraction of the heart is called ___________ (v) The main excretory product in human beings is ___________ (vi) Sweat contains water and . (vii) Kidneys eliminate the waste materials in the liquid form called . (viii) Water reaches great heights in the trees because of suction pull caused by ______.

(i) The blood from the heart is transported to all parts of the body by the  arteries  .

(ii) Haemoglobin is present in  red blood  cells.

(iii) Arteries and veins are joined by a network of  capillaries .

(iv) The rhythmic expansion and contraction of the heart is called  heartbeat .

(v) The main excretory product in human beings is  urea  .

(vi) Sweat contains water and  salts  .

(vii) Kidneys eliminate the waste materials in the liquid form called  urine  .

(viii) Water reaches great heights in the trees because of suction pull caused by  transpiration .

Question 3: Choose the correct option:

(a) In plants, water is transported through

(i) Xylem (ii) Phloem (iii) Stomata (iv) Root hair

Answer: (i) Xylem

(b) Water absorption through roots can be increased by keeping the plants

(i) In the shade (ii) in dim light (iii) under the fan (iv) covered with a polythene bag

Answer: (iii) under the fan

Question 4: Why is transport of materials necessary in a plant or in an animal? Explain.

Answer: The cells of different organs of plants and animals need various necessary substances to carry out many metabolic activities and different type of waste products are created during these metabolic activities. So, transport of materials is necessary to supply the required substances and to remove the waste products.

Question 5: What will happen if there are no platelets in the blood?

Answer: The blood platelets are responsible for the clotting of the blood. When some injury occurs blood starts flowing. But it clots on its own. If there are no platelets, the blood will not be able to clot and keep on flowing. Huge loss of blood ultimately causes death.

Question 6: What are stomata? Give two functions of stomata.

Answer: The numerous pores under the surface of leaf are called stomata. Transpiration and exchange of gases (carbon dioxide and oxygen) are the main functions of stomata.

Question 7: Does transpiration serve any useful function in the plants? Explain.

Answer: Transpiration serves following function in plants

  • It helps in lowering temperature of plants, thus preventing heat injury of plants.
  • Helps in transpiration pull, which helps in raining water in higher plants.
  • It also causes loss of water absorbed by plants.

Question 8: What are the components of blood?

Answer: Blood is a liquid, which has cells of various kinds suspended in it. Main components of blood are:

  • Plasma: The fluid part of the blood is called plasma.
  • RBC: One type of cells are the red blood cells (RBC) which contain a red pigment called haemoglobin.
  • WBC: The blood also has white blood cells (WBC) which fight against germs that may enter our body.
  • Platelets: The clotting of blood is caused by another type of cells in the blood, called platelets.

Question 9: Why is blood needed by all the parts of a body?

Answer: Blood is needed by all parts of the body as it is an important part of the transport system of our body. It performs the following important functions:

(i) It transports O 2  from the lungs to all the body cells. (ii) It carries CO 2 , a waste product back to the lungs so that it can be exhaled easily. (iii) It transmits heat, thus regulating the body temperature. (iv) It also fights off diseases and infections.

Question 10: What makes the blood look red?

Answer: The presence of haemoglobin, a red pigment in the red blood cells (RBCs) makes blood appear red in colour. The haemoglobin carries oxygen and transports it to all the parts of the body.

Question 11: Describe the function of the heart.

Answer: The heart is an organ which beats continuously to act as a pump for the transport of blood, which carries other substances with it. The heart pumps the deoxygenated blood to the lungs for oxygenation and receives oxygenated blood from lungs. It pumps the oxygenated blood to different parts of the body.

NCERT Solutions for Class 7 Science Chapter 11 Transportation in Animals and Plants image 1

Question 12: Why is it necessary to excrete waste products?

Answer: All cells of our body produce waste products. These waste products are toxic to the body and therefore need to be excreted out. This process of removing waste products produced in the cells of living organisms is called excretion.

Question 13: Draw a diagram of the human excretory system and label the various parts.

NCERT Solutions for Class 7 Science Chapter 11 Transportation in Animals and Plants image 2

Having a good grasp over CBSE NCERT Solutions for Class 7 Science will further help the students in their preparation for board exams and other competitive exams. NCERT Solutions for Class 7 Science Chapter 7 Transportation in Animals and Plants provided by CBSE Path help students to clear their doubts and to obtain good marks in the exams. All the solutions provided in this article are strictly based on the CBSE syllabus and curriculum.

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case study on transportation in animals and plants class 7

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Ncert solutions for class 7 science Transportation in Animals and Plants

class 7 science transportation in animals and plants

Ncert solutions for class 7 science Transportation in Animals and Plants – Chapter 11 – with questions and answers pdf as well as mcq with answers

Table of Contents

Summary of Ncert solutions for class 7 science Transportation in Animals and Plants

This chapter is on the Circulatory system and its components in plants and animals. This system transports materials like nutrients, fiber, oxygen and carbon dioxide. through blood. It also talks about the execratory system.

Ncert solutions for class 7 science Transportation in Animals and Plants

Circulatory system – Ncert solutions for class 7 science Transportation in Animals and Plants

  • Blood is a fluid tissue that transports nutrients and oxygen to the cells and carries away carbon dioxide and other waste products in our body.
  • The fluid part of blood is called plasma and has various salts and nutrients dissolved in it. Plasma is mostly made up of water (up to 95%) and contains dissolved nutrients, carbon dioxide and oxygen.
  • Blood consists of Red blood cells (RBCs) which carry oxygen to various parts of our body, White Blood Cells (WBCs) which are a part of our immunity system and Platelets which provide for clotting of blood.

Blood vessels

  • They carry the blood to different parts of our body.
  • There are three types – arteries (carry oxygenated blood to the cells and tissues of our body), veins (carry away deoxygenated blood from the cells and tissues of our body) and capillaries (exchange of material between circulation and cells).

Read more: NCERT Solutions For Class 7 Science Chapter 7 Weather, Climate and Adaptations of Animals to Climate

  • It pumps blood through blood vessels to all the parts of the body.
  • The upper chambers are called atria and the lower chambers are called as ventricles.
  • They are present between atria and ventricles and at the base of big vessels leaving the heart and ensures unidirectional flow of blood.

Pulmonary circuit

  • It is the network of arteries and veins connecting the heart and lungs.
  • They have blood vessels wrapped around it and the blood is oxygenated by diffusion.
  • The heart periodically expands and contracts to pump blood into the arteries, which also expands and contracts as the blood flows through them. This is called pulsation.
  • Pulsation is measured as the number of heartbeats per minute, which is nothing but pulse rate.

Execratory System

The process of removal of waste products from the cells of living organisms is called excretion.

Kidneys, Ureters and Urinary Bladder

  • We have two kidneys that produce urine for excretion and it contains millions of tiny tubules that act as microscopic filters and filter out the useful and harmful substances from the blood.
  • The useful substances are again reabsorbed back into the blood and only harmful substances are concentrated.are present in a dissolved state in water and now it is called as urine.
  • Urine is sent from the kidneys to the urinary bladder through tubes called ureters.
  • The urinary bladder is a muscular bag where urine is accumulated and excreted from the body through the urethra.

Transportation in Plants

Xylem and phloem.

  • Phloem is the plant tissue that transports the soluble and organic material created during photosynthesis from the leaves to the other parts of the plant
  • Xylem is the plant tissue that transports the water and other nutrients from the roots to other parts of the plant.

Transpiration

  • Transpiration is the loss of water in the form of water vapour from stomata present on leaves.

Ncert solutions for class 7 science Transportation in Animals and Plants – Chapter 11 – with questions and answers pdf as well as mcq with answers has been provided with a summary and explanation as seen above.

Questions and Answers – Ncert solutions for class 7 science Transportation in Animals and Plants

1. Match structures given in Column I with functions given in Column II.

(i) Stomata(b) Transpiration
(ii) Xylem(d) Transport of water
(iii) Root hairs(a) Absorption of water
(iv) Phloem(c) Transport of food

2. Fill in the blanks.

(i) The blood from the heart is transported to all parts of the body by the .

(ii) Haemoglobin is present in cells.

(iii) Arteries and veins are joined by a network of .

(iv) The rhythmic expansion and contraction of the heart is called .

(v) The main excretory product in human beings is .

(vi) Sweat contains water and .

(vii) Kidneys eliminate the waste materials in the liquid form called .

(viii) Water reaches great heights in the trees because of suction pull caused by .

(i) The blood from the heart is transported to all parts of the body by the  arteries  .

(ii) Haemoglobin is present in  red blood  cells.

(iii) Arteries and veins are joined by a network of  capillaries .

(iv) The rhythmic expansion and contraction of the heart is called  heartbeat .

(v) The main excretory product in human beings is  urea  .

(vi) Sweat contains water and  salts  .

(vii) Kidneys eliminate the waste materials in the liquid form called  urine  .

(viii) Water reaches great heights in the trees because of suction pull caused by  transpiration  .

Short answers – Ncert solutions for class 7 science Transportation in Animals and Plants

3. Choose the correct option:

(a) In plants, water is transported through

(ii) phloem

(iii) stomata

(iv) root hair

(b) Water absorption through roots can be increased by keeping the plants

(i) in the shade

(ii) in dim light

(iii) under the fan

(iv) covered with a polythene bag

a) i) Xylem

b) iii) under the fan

4. Why is transport of materials necessary in a plant or in an animal? Explain.

Transport of materials is necessary in a plant or an animal for the following reasons:

  • To transport food to various parts of the body
  • Animals need to transport wastes to parts from where they can be removed.

5. What will happen if there are no platelets in the blood?

If there are no platelets, then blood will not clot as platelets release blood clotting factor at the site of injury.

6. What are stomata? Give two functions of stomata.

Tiny pores present on the leaf surface are known as stomata.

Functions of stomata

  • Helps in exchange of gases
  • Evaporation of water through leaves occurs due to stomata.

7. Does transpiration serve any useful function in the plants? Explain.

Transpiration serves the following functions in plants

  • It helps in lowering temperature of plants, thus preventing heat injury of plants.
  • Helps in transpiration pull, which helps in raining water in higher plants.
  • It also causes loss of water absorbed by plants.

8. What are the components of blood?

Red blood cells, white blood cells, platelets and plasma.

9. Why is blood needed by all the parts of a body?

Blood is a significant part of transport system in our body, and we need blood for the following reasons:

  • For the transport of oxygen to all parts of our body
  • To expel out carbon dioxide from our body
  • To transmit heat thus helping in the regulation of body temperature.
  • It is required to fight out infections and diseases.

10. What makes the blood look red?

Haemoglobin, a red pigment present in the blood makes it look red.

11. Describe the function of the heart.

The heart is an organ which beats continuously to act as a pump for the transport of blood, which carries other substances with it. The heart has four chambers. The two upper chambers are called the atria (singular: atrium), and the two lower chambers are called the ventricles. The partition between the chambers helps to avoid mixing up of blood-rich in oxygen with the blood-rich in carbon dioxide. Blood flows from the heart to the lungs and back to the heart from where it is pumped to the rest of the body.

12. Why is it necessary to excrete waste products?

When our cells perform their functions, certain waste products are released. These are toxic and hence need to be removed from the body.

13. Draw a diagram of the human excretory system and label the various parts.

human excretory system

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Important Questions for CBSE Class 7 Science Chapter 11 – Transportation in Animals and Plants

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Class 7 Science Chapter 11 Extra Question Answer – Transportation in Animals and Plants

Science is an extensive subject with a variety of different topics covering Physics, Chemistry and Biology subjects. So to excel in this subject, students must go through the chapter and understand the underlying concept to get a good understanding of the chapter.. The more students are able to relate to real-life examples of science and understand the foundational concepts, the more effectively they can retain the topic.

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Transportation in plants and animals class 7 extra questions and answers is an essential chapter in Class 7 Science. This chapter highlights the importance of circulatory and excretory systems in humans and their processes. It is also one of the chapters in which it’s easier for students to score full marks. Students will learn about the following topics in this chapter:

  • The circulatory system in humans
  • Excretory system in humans
  • The transportation system in plants

Students struggle to score good marks in exams as they do not care to understand the concepts and learn chapters in haste. . To help students with their studies, Extramarks, a leading educational platform, provides high-quality educational resources.

For well-rounded preparations for exams, students are advised to solve class 7 science chapter 11 extra questions . It’s also helpful for students to study Chapter 11 from the NCERT textbook and NCERT exemplar. To score good marks in exams, students should also practice CBSE past years’ question papers along with Chapter 11 Class 7 Science Important Questions. We have all the answers to your queries. This encourages the students to master the topic and increases their confidence in achieving a high grade.

Class 7 Science Chapter 11 Important Questions with Solutions

Science is considered to be a bit of a challenging subject involving a lot of complex theories. Sometimes it requires solving chapter-end problems, and revisions for students to remember the concept. To make the process of question-solving easier and more efficient, the Extramarks team have curated questions from various sources and collated them in our question bank Science Class 7 Chapter 11 Important Questions. These questions are from NCERT textbook, exemplar, past years’ questions, etc.

Following are some of the questions and their solutions from   Chapter 11 Important Questions for Class 7 Science prepared by in-house subject experts of Extramarks.

Question 1: Why is the transport of materials necessary in a plant or in an animal? Explain.

Answer 1: Transporting minerals to every cell in plants and animals is important as all the cells require specific nutrients and a regular supply of oxygen for releasing energy through respiration.

The food we intake is broken down into smaller components for easy absorption by cells.

The oxygen we breathe also is transported to all the cells of the body. Organisms also require the execution of constant removal of waste materials such as carbon dioxide, urea and uric acid.

For the transportation of materials, humans have a very complex and specialized system, and in plants, transportation of water and minerals is performed through a vascular tissue system.

Question 2: What will happen if no platelets are in the blood?

Answer 2: Absence of platelets or lack of platelets in blood results in the blood being unable to clot. Blood clots are because platelets are present in the blood, which are responsible for releasing a few chemicals which clot the blood. Hence, if there are no platelets present in the blood, the blood will not clot and will not be able to prevent further bleeding.

Question 3: 

Fill in the blanks.

(i) The blood from the heart is transported to all parts of the body by the _____________ .

(ii) Haemoglobin is present in _____________ cells.

(iii) Arteries and veins are joined by a network of _____________ .

(iv) The rhythmic expansion and contraction of the heart is called _____________.

(v) The main excretory product in human beings is _____________.

(vi) Sweat contains water and _____________ .

(vii) Kidneys eliminate the waste materials in the liquid form called _____________ .

(viii) Water reaches great heights in the trees because of suction pull caused by _____________ .

i) The blood from the heart is transported to all parts of the body by the

(ii) Haemoglobin is present in red blood cells.

(iii) Arteries and veins are joined by a network of capillaries.

(iv) The rhythmic expansion and contraction of the heart is called the heartbeat.

(v) The main excretory product in human beings is urea.

(vi) Sweat contains water and salts.

(vii) Kidneys eliminate the waste materials in the liquid form called urine.

(viii) Water reaches great heights in the trees because of suction pull caused by transpiration.

Question 4: What are stomata? Give two functions of stomata.

Answer 4:  Tiny pores on the lower side of the leaf’s surface are known as stomata.

The functions of stomata are 

  • Stomata help in the exchange of gases necessary for the respiration of the plant.
  • Evaporation of water from the surface of the leaf to the atmosphere also occurs through stomata. This process is also known as transpiration.

Question 5: Does transpiration serve any useful function in plants? Explain.

Answer 5:  Transpiration is the process of evaporation of water from the plant to the atmosphere through the stomata majorly present on the lower surface of the leaf.

Transpiration is responsible for the loss of water the plants absorb. . Transpiration is also important for plants as it helps in the movement of water throughout the plant. As a result, transpiration helps in the distribution of water throughout the plant body.

It also plays an important role in the cooling of the plant.

Question 6: What are the components of blood?

Answer 6: There are three components of blood those are:

  • Red Blood Cells (RBCs) 2. White Blood Cells (WBCs) 3. Platelets
  • Red Blood Cells (RBCs): Red blood cells in the blood are the most abundant cells present. It contains a red pigment known as haemoglobin that binds with oxygen.  It’s the haemoglobin which carries oxygen and transports it to all parts of the body.
  • White Blood Cells (WBCs): White blood cells are colourless cells without haemoglobin. Their main function is to fight against infections and protect the body from foreign particles like bacteria and viruses.
  • Platelets: Platelets are the smallest cells present in the blood. Their main function is to prevent bleeding.

Question 7: Why is blood needed by all the parts of a body?

Answer 7:  Blood is the main medium of transportation  for the body. It is needed by all body parts as it performs the following important functions:

  • Blood transports oxygen from the lungs to all the cells in our body.
  • It carries carbon-di-oxide from the body back to the lungs so it can be exhaled easily.
  • Blood also regulates heat, thus helping in thermoregulation.
  • Blood contains WBCs responsible for fighting diseases and infections.

Question 8: Describe the function of the heart.

Answer 8: The heart is a muscular organ responsible for pumping blood and keeping a person alive. The human heart has four chambers; the two upper chambers are called the right and left atrium, respectively, and the two lower chambers are called the right and left ventricles. 

The flow of blood in the human heart:

The right atrium receives deoxygenated carbon dioxide-rich blood from the body through the pulmonary artery. Blood from the right atrium is pumped to the right ventricle, which pumps blood to the lungs.

exchanging gases takes place in the lungs, and oxygen-rich blood exits the lungs and reaches the left atrium through the pulmonary vein. Blood is then pumped to the left ventricle, from where blood is pumped to all parts of the body.

Hence, the rhythmic contraction and expansion of the heart transports blood to all parts of the body and also causes the sound of a heartbeat.

Function of the heart

Question 9: Why is it necessary to excrete waste products?

Answer 9:   All cells in our body excrete waste while performing their function. This, although present in low quantity, is toxic for our body hence the need to excrete them. . The process of removing waste products produced in the cells of living organisms is called excretion.

Question 10: 

The muscular tube through which stored urine is passed out of the body is called –

(c) urethra

(d) urinary bladder

Answer 10:  ( c) Urethra

The waste present in our body is removed by the blood capillaries present in our kidneys. From the kidneys, the urine reaches the urinary bladder through tube-like structures known as ureters. The stored urine is then passed out through a urinary opening at the end of a muscular tube called the urethra.

Question 11: They are pipe-like, consisting of a group of specialised cells. They transport substances and form two-way traffic in plants. Which of the following terms qualify for the features mentioned above?

(a) Xylem tissue

(b) Vascular tissue

(c) Root hairs

(d) Phloem tissue

Answer 11:  (d) Phloem tissue

Phloem tissue consists of a group of specialised cells. Sieve tubes make up the majority of the phloem. They are elongated tubular cells which act as conducting channels of phloem through which food is transported. The contents of the phloem can move upwards and downwards; hence, they form two-way traffic in plants.

Question 12: In which of the following parts of the human body are sweat glands absent?

(b) Armpits

Answer 12:   ( c) Lips

Sweat glands function for the production of sweat. Lips lack the presence of sweat glands. Therefore lips do not sweat.

Question 13: Veins have valves which allow blood to flow only in one direction. Arteries do not have valves. Yet the blood flows in one direction only. Can you explain why?

Answer 13: Arteries do not have valves. Yet the blood flows in only one direction as opposed to the unidirectional, rapid blood flow found in arteries. 

Question 14: Arrange the following statements in the correct order in which they occur during the formation and removal of urine in human beings.

(a) Ureters carry urine to the urinary bladder.

(b) Wastes dissolved in water are filtered out as urine in the kidneys.

(c) Urine stored in the urinary bladder is passed out through the urinary opening at the end of the urethra.

(d) Blood containing useful and harmful substances reaches the kidneys for filtration.

(e) Useful substances are absorbed back into the blood.

Question 15: 

Name the process and the organ which helps in removing the following wastes from the body.

(a) Carbon dioxide

(b) Undigested food

Answer 15: 

a) Exhalation Lungs
b) Egestion Large Intestine
c) Excretion Kidneys
d) Perspiration Sweat Glands

Question 16: Fill in the blanks of the following paragraph using just two words – arteries and veins.

___(a)___ carry oxygen-rich blood from the heart to all parts of the body, and ___ (b)___ carry carbon dioxide-rich blood from all parts of the body back to the heart. ___ (c)___ have thin walls and __ (d)___ have thick elastic walls. Blood flows at high pressure in ___ (e)____. Valves are present in __ (f) ___, which allow blood to flow only towards the heart. __ (g)___ divide into smaller vessels. These vessels further divide into extremely thin tubes called capillaries. The capillaries join up to form ____ (h)_____.

Answer 16: 

a)Arteries carry oxygen-rich blood from the heart to all parts of the body, and b)veins carry carbon dioxide-rich blood from all parts of the body back to the heart. c)Veins have thin walls, and d)arteries have thick elastic walls. Blood flows at high pressure in e)arteries . Valves are present in f)veins which allow blood to flow only towards the heart. g)Arteries divide into smaller vessels. These vessels further divide into extremely thin tubes called capillaries. The capillaries join up to form h)veins.

Question 17: Define pulse.

Answer 17 : Throbbing or the rhythmic contraction and dilation that occurs in the arteries resulting from the heartbeat is called a pulse.

Question 18: Define osmoregulation.

Answer 18: Maintaining the osmotic pressure of the body fluids by controlling the amount of water and electrolyte in the body is called osmoregulation.

Question 19: Explain Dialysis.

Answer 19: Dialysis is a medical treatment performed in patients with weak or faulty kidneys. It is an artificial machine containing a tank with a solution of water glucose and salt with a concentration similar to blood. The patient’s blood is taken through the artery and is allowed to pass through the solution for the removal of waste. The purified blood devoid of any impurities is then pumped back to the vein. Dialysis is continued until all the blood has been purified.

Question 20: Why do sponges and hydra lack blood?

Answer 20: Animals such as sponges and hydra do not possess any circulatory system as their habitat, water in which they live brings food and oxygen, and it enters through pores present on their body surface, and the waste is carried out. .

Question 21: Differentiate between Artery and Vein.

Answer 21: The following are the differences between  artery and vein:  

ARTERY VEIN
Arteries carry blood from the heart to various body parts. Veins carry blood from the various parts of the body to the heart.
Arteries carry oxygenated blood from the heart, except the pulmonary artery. Veins carry deoxygenated blood from the body parts, except the pulmonary vein.
Arteries carry blood under high pressure. In veins, blood flows comparatively slowly.
As blood flows rapidly, no valves are present. Valves are present to prevent the blood from flowing backwards. 

Question 22: Ammonia is excreted in gaseous form by:

Answer 22: b) Pisces

Ammonia is excreted in gaseous form in Pisces like fishes as it gets directly dissolved in water.

Animals like snakes and lizards excrete uric acid, which is a semi-solid, white-coloured compound. 

Humans secrete waste in the form of urea.

Benefits of Solving Class 7 Science Chapter 11 Important Questions

Extramarks leaves no stone unturned when it comes to providing the best learning material with unmatchable speed and accuracy for students irrespective of the class and subject. Important Questions Class 7 Science Chapter 11 is created by Extramarks to aid students in scoring good marks in exams. This question bank has been curated to include questions which have a higher likelihood of appearing in exams. Therefore it is extremely critical for students to practice Important Questions Class 7 Science Chapter 11 before taking exams.

Given below are a few benefits of solving Important Questions Class 7 Science Chapter 11: 

  • Question bank for class 7 science chapter 11 question answer  is created by subject experts to help students fully revise the chapter while solving the questions. The solutions provided after the questions contain not only the answer but also the explanation of how that answer is achieved.
  • Through solving Important Questions in Class 7 Science Chapter 11, students learn how to apply concepts learnt from the NCERT textbook. Using these questions as a guide, students can improve their understanding of the concept and thus perform well in exams.
  • This list of Important Questions Class 7 Science Chapter 11 contains questions from every  chapter, and covers each and every topic.. This is quite useful for students as they get to revise the whole chapter in one go..
  • The question bank contains questions of all formats, i.e. MCQs, very short answer questions, short answer type questions, and long answer type questions. So students get a real-exam type practice and it helps them to better perform in the actual exam.This encourages the students to master the topic and increases their confidence in achieving a high grade. 

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Q.1 Describe how does the process of excretion in fishes and birds differ from humans? 

Depending on the habitat and feeding habits, different species use different excretion methods like the kidney, lungs, skin, and eyes. Aquatic animals like fishes excrete metabolic wastes as ammonia, in gaseous form which directly dissolves in water. Land animals like birds, lizards and snakes excrete a semi-solid, white coloured compound, known as uric acid, whereas humans excrete urea as their major excretory product.

Q.2 Name the different blood components.

Blood is composed of four different components: 1. White Blood Cells (WBC): These cells fight against harmful microbes or germs and kill them. These are largest in size. 2. Red Blood Cells (RBC): These cells contain haemoglobin (a red pigment) that transports oxygen throughout the body. 3. Platelets: These are cells that help to prevent blood loss by clotting it. 4. Plasma: This is the fluid part of the blood.

Q.3 (a) Show the flow of blood in human heart with help of a diagram. (b) How does the blood circulate in human body?

case study on transportation in animals and plants class 7

(b) Heart plays a major role in circulating oxygenated blood around the body through blood vessels. In humans, blood is pumped from the left ventricle of the heart through arteries to body organs and then returns to the right atrium of the heart through veins. It then enters the right ventricle and is pumped through the pulmonary artery to the lungs and returns to the left atrium through the pulmonary veins. Arteries carry oxygenated blood to all parts of the body and veins carry deoxygenated blood rich in carbon dioxide, a waste product of metabolism by cells, to the lungs to be exhaled. However, pulmonary artery contains the deoxygenated blood in the body, while pulmonary vein contains oxygenated blood.

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Important questions for class 7 science, chapter 1: nutrition in plants.

case study on transportation in animals and plants class 7

Chapter 2: Nutrition in Animals

Chapter 4: heat, chapter 5: acids, bases and salts, chapter 6: physical and chemical changes, chapter 7: weather, climate and adaptations of animals to climate, chapter 8: winds, storms and cyclones, chapter 9: soil, chapter 10: respiration in organisms, chapter 12: reproduction in plants, chapter 13: motion and time, chapter 14: electric current and its effects, chapter 15: light, chapter 16: water: a precious resource, chapter 17: forests: our lifeline, chapter 18: wastewater story, faqs (frequently asked questions), 1. what is the right strategy to score good marks in class 7 science.

When it comes to studying, there is no right way as every student has a different potential to perform. However, there are some tips which help you to score well.

Students are advised to go through the syllabus and prepare a timetable giving every chapter equal time.  Students must start preparing for exams with an ample amount of time and avoid late-night studies and chugging of materials.

Students must read the NCERT textbook carefully and solve NCERT exercises and NCERT exemplar exercises. Students are also advised to solve Important Questions Class 7 Science Chapter 11 to master the skill of writing perfect answers. This will definitely help them in exams as they are confident enough to write answers to difficult questions with ease.

2. How to access Extramarks resources?

Extramarks is one of the leading educational platforms providing study materials for students desiring to score well in exams. To access Extramarks resources, students must register themselves on the Extramarks website.  Then students can get access to Extramarks resources, including Important Questions Class 7 Science Chapter 11. These important questions will enhance the clarity of concepts which in turn becomes useful when it comes to answering the advanced questions.

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Notes of Ch 11 Transportation in Animals and Plants Class 7th Science

Revision notes of ch 11 transportation in animals and plants class 7th science.

  • Circulatory System
  • Blood vessels
  • Excretory system
  • Transport in plants
  • Excretion in plants

case study on transportation in animals and plants class 7

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NCERT Solutions for Class 6, 7, 8, 9, 10, 11 and 12

Transportation in Animals and Plants Class 7 Extra Questions Science Chapter 11

June 4, 2019 by Sastry CBSE

Transportation in Animals and Plants Class 7 Science Extra Questions Very Short Answer Type Questions

Question 1 . Name some useful products or materials that are carried by blood. Answer: Food, water and oxygen are the products that are carried by blood to every part of the body.

Question 2. Circulatory system consists of three major organs. Name those organs. Answer: The circulatory system consists of three major organs, i.e., blood, blood vessels and heart.

Question 3. Give the name of blood component which is liquid and contains 90% water. Answer: The sticky liquid part of the blood, containing 90% water is called plasma.

Question 4. Name the organ which is located in the chest cavity with its lower tip slightly tilted towards the left. [NCERT Exemplar; HOTS] Answer: The heart is located in the chest cavity with its lower tip slightly tilted towards the left.

Question 5. RBC contains a red coloured pigment which carries oxygen with it. What is the pigment called? Answer: The red coloured pigment of RBC that carries oxygen with it is called haemoglobin.

Question 6. Veins have valves which allow blood to flow only in one direction. Arteries do not have valves. Yet the blood flows in one direction only. Can you explain why? [NCEAT Examplar; HOTS] Answer: Veins have valves to prevent blood from flowing backwards and pooling, whereas arteries pump blood at very high pressures, which naturally prevents back flow

Question 7. In which form, the oxygen is transported to various body parts by haemoglobin? Answer: The red pigment, haemoglobin binds with oxygen to form oxyhaemoglobin which is transported to various body parts.

Question 8. Certain greenish-blue lines appear just below the skin of our hands and leg. What are these? Answer: The greenish-blue lines that appear just below the skin of our hands and legs are veins.

Question 9. Human blood group is divided into how many groups? Name them. Answer: Human blood group is divided into four groups. These are A, B, AB and O.

Question 10. Waste carbon dioxide and urea are removed from our body by which organs? Answer: The carbon dioxide is removed by lungs while urea is removed from the body by kidney.

Question 11. Blood is a fluid connective tissue. Justify. Answer: Blood is a fluid tissue which connects all the parts of body with each other.

Question 12. Blood performs various functions including protection against infections. How? Answer: Blood contains WBC which forms the defense of our body. They eat antigens and fights aganist infections.

Question 13. Pulse rate can indicate the health states of an individual. How? Answer: Pulse rate will increase or decrease from normal rate if a person is not well.

Question 14. Usually veins carry deoxygenated blood except in one case. Specify. Answer: Pulmonary veins carry oxygenated blood from lungs to heart.

Question 15. State the function of valves ? Answer: Valves prevent the back flow of blood between chambers of heart.

Question 16. Name the functional units of the major excretory organ of humans. Answer: Kidney is the major excretory organ and nephrons are its functional units.

Question 17. Exchange of gases, food and other substances occurs between arteries and veins. How does this exchange happen? Answer: Exchange of substances between arteries and veins occurs via capillaries.

Question 18. Measuring of heartbeats is a significant step during health checkups. Name the instrument used for the same. Answer: Stethoscope

Question 19. Kidneys are the major excretory organs in humans. How will the waste products released will be excreted out if the kidneys are damaged or unfunctional? [HOTS] Answer: Artificial ways of waste removal are used like dialysis which are referred to as artificial kidneys.

Question 20. Arteries have a very thick and elastic walls. Why? Answer: Arteries carry blood at a very high pressure due to pumping action of heart hence, the need of thicker walls.

Question 21. Skin is also considered as an excretory organ. Give reason if you agree. [HOTS] Answer: Yes, skin is an excretory organ as it secretes waste products by releasing sweat from the surface.

Question 22. Heart has three chambers, two ventricles and one atrium. Is it right or wrong? Answer: Wrong, the heart has four chambers. Two auricles and two ventricles.

Question 23. Arteries and veins carry blood to and from the heart. Which of these carry the blood? (a) Back to the heart from all organs. (b) Away from heart for distribution in all organs. Answer: (a) Veins (b) Arteries

Question 24. Urine is called an excretory product. Why? Answer: Urine is the mixture of urea and other unwanted salts with water which is needed to be excreted out as its presence in blood can make a person ill.

Question 25. Sponges and Hydra do not possess any circulatory system then how do they carry out distribution of food and other substances? Answer: The water in which these organisms live brings them food and oxygen as it enters their bodies.

Question 26. If the heartbeats of a person are more than 72-80 beats per minute. What does it signify? Answer: The faster heartbeats signify that heart is pumping more blood to the organs as they need increased oxygen and energy supply.

Question 27. What is the purpose of using stethoscope by doctors? Answer: A stethoscope reads heartbeats as diaphragm amplies the rounds of heartbeat when placed on specific areas.

Question 28. Urinary bladder is the part of human excretory system. What is its role in excretion? Answer: Bladder stores the excretory product released after filtration from kidney and excrete it out at specific times.

Transportation in Animals and Plants Class 7 Science Extra Questions Short Answer Type Questions

Question 1. Arrange the following statements in the correct order in which they occur during the formation and removal of urine in human beings. (a) Ureters carry urine to the urinary bladder. (b) Wastes dissolved in water is filtered out as urine in the kidneys. (c) Urine stored in urinary bladder is passed out through the urinary opening at the end of the urethra. (d) Blood containing useful and harmful substances reaches the kidneys for filtration. (e) Useful substances are absorbed back into the blood. Answer: The correct order of the formation and removal of urine in human beings is (d) Blood containing useful and harmful substances reaches the kidneys for filtration. (e) Useful substances are absorbed back into the blood. (b) Wastes dissolved in water is filtered out as urine in the kidneys. (a) Ureters carry urine to the urinary bladder. (c) Urine stored in urinary bladder is passed out through the urinary opening at the end of the urethra.

Question 2. Name the tissues of a plant which carries (a) water and minerals from roots to the leaves. (b) food from the leaves to the other parts of the plant. Answer: The tissue which carries (a) water and minerals from roots to leaves is xylem. (b) food from the leaves to the other parts of the plant is phloem.

Transportation in Animals and Plants Class 7 Extra Questions Science Chapter 11 1

Question 4. (a) Name the only artery that carries carbon dioxide rich blood. (b) Why is it called an artery if it does not carry oxygen-rich blood? [NCERT Exemplar] Answer: (a) The only artery that carries carbon dioxide rich blood is pulmonary artery. (b) The main function of artery is to carry blood away from heart. Also arteries have thick wall and do not contain valves in them. Blood flow in arteries, takes place at high pressure. All these characteristics are found in pulmonary artery. It carries deoxygenated blood from heart to lungs for oxygenation, therefore it is called artery.

Question 5. Name the process and the organ which help in removing the following wastes from the body. (a) Carbon dioxide (b) Undigested food (c) Urine (d) Sweat [NCERT Exemplar] Answer:

(a) Carbon dioxide Exhalation Lungs
(b) Undigested food Egestion Large intestine and anus
(c) Urine Excretion Kidneys
(d) Sweat Perspiration

(sweating)

Sweat glands

Transportation in Animals and Plants Class 7 Extra Questions Science Chapter 11 3

Question 7. What is the relation between the rate of heartbeat and pulse rate? If a pulse rate of an athlete Is 96/min, what will be the number of his heartbeat at the same time? [HOTS] Answer: The rhythmic contraction and relaxation of the muscles of the heart is called heartbeat. Whereas, the rhythmical throbbing of the arteries as the blood is pushed forward through them is called pulse. It can be felt in the wrist, temples, etc. Pulse rate is the number of heartbeats per minutes. The number of heartbeat is equal to the number of pulse per minute. Therefore, if a pulse rate of an athlete is 96/min then the number of his heartbeat at the same time will also be 96/min

Question 8. Give one function of each of the following organs, (a) Blood vessels (b) Kidney (c) Blood platelets (d) Heart Answer: The main function of the following organs are as follows: (a) Blood vessels These run between the heart and the rest of the body. It helps in the transport of blood between heart and various organs of the body. (b) Kidney It is called as the ‘magic filters’. It helps in the removal of unwanted substances like urea from the blood. (c) Blood platelets This component of blood helps in blood clotting and prevents the blood loss from the body. (d) Heart It is a pumping organ which receives blood from the body through veins and pumps it with enough force into the arteries from where it is carried to the various body parts.

Question 9. Paheli noticed water being pulled up by a motor pump to an overhead tank of a five storeyed building. She wondered how water moves up to great heights in the tall trees standing next to the building. Can you tell why? [NCERT Exemplar; HOTS] Answer: When the water is pulled up by a motor-pump to an overhead tank of a five storeyed building, it moves to a great height due to the suction pull. This pull forms the continuous column of water and water rises up to a great height. Similarly, when transpiration occurs in the plants, water is evaporated and this creates a suction pull in the plants.

Due to this suction pressure, water from the soil rises up through the roots of the plants and reaches to a great height in tall plants.

Question 10. How is transpiration and translocation different from each other. Answer: The differences between transpiration and translocation are

The evaporation of water from the leaves of plant is called transpiration. The transport of soluble products of photosynthesis from leaves (from where they are formed) to the other parts, of plants is called translocation.
It takes place through stomata present in the lower surface of leaf. It occurs in the part of the vascular tissue known as phloem.

Question 11. Make a table depicting the function of all chambers of the human heart. Answer: The human heart is divided into four chambers, i. e. upper two atrium and lower two ventricles. The functions of these chambers can be tabulated as follows

Left atrium Receives oxygenated blood from lungs through pulmonary veins and pours it into left ventricle.
Right atrium Receives deoxygenated blood from various body parts through superior and inferior vena cava and pours it into right ventricle.
Left ventricle Pumps oxygenated blood to various parts of body through aorta.
Right ventricle Pumps deoxygenated blood into lungs through pulmonary artery.

Question 12. How does the water move from root to leaves? Answer: The water moves from root to leaves with the help of specialised cells called vascular tissue. Transport of water and nutrients is done by xylem tissue present in plants.

Transportation in Animals and Plants Class 7 Extra Questions Science Chapter 11 5

Question 15. Paheli says her mother puts ladyfinger and other vegetables in water if they are somewhat dry. She wants to know how water enters into them. [HOTS] Answer: By soaking the vegetables in water, the skin of the vegetables becomes moist and water starts moving from one cell to another until the vegetables are fresh again.

Question 16. Why plants absorb a large quantity of water from the soil, then give it off by transpiration? Answer: Plants absorb a large quantity of water from the soil because they need nutrients which are dissolved in the water. The excess water evaporates through the stomata present on the leaf surface by the process of transpiration.

Question 17. List some animals surrounding your locality group them into following groups. (a) Animals that excrete ammonia in gaseous forms. (b) Animals that excrete uric acid in the form of pellets. (c) Animals that excrete urea in the form urine. [HOTS] Answer: Some animals that surround us are fish, frog, birds, tadpole larva, snake, cow, man, rat, monkey, lizard, toad and snail. These can be grouped as follows (a) Animals that excrete ammonia in gaseous form (i.e. ammonotelics)-Fish, tadpole larva. (b) Animals that excrete uric acid in the form of pellets (i.e. uricotelics)—Bird, snake, rat, lizard, snail. (c) Animals that excrete urea in the form of urine (i.e. ureotelics)-Frog, cow, man, monkey, toad.

Question 18. Human have two major organs that perform transport of materials. Organ ‘A’ is bean-shaped and dark red in colour lie just above the waist. It helps in’removal of ‘Q’, a waste material from blood. The organ ‘S’ is the opening at the end of the urinary bladder through which the waste material is eliminated. Organ ‘B’ lies in the chest cavity slightly tilted towards the left side. It pumps continuously and pours liquid ‘C’ into arteries and through very fine tube-like structure ‘D’ distributes the liquid to various parts of the body. What are the name of these organs. [HOTS] Answer: Organ ‘A’ is kidney which is bean-shaped and helps in the removal of urea (Q) which is a waste material from the blood. ‘S’ is urethra which is the small opening at the end of urinary bladder. Organ ‘B’ is heart which acts as pump. It pumps liquid blood continuously and pours into arteries, and through capillaries (D) which are fine tube-like structure, the blood is distributed to various parts of the body.

Question 19. The major function of the arteries is to carry to oxygenated blood throughout the body and that of veins is to carry deoxygenated blood from body parts to heart for purification. There is one artery that carries deoxygenated blood and one vein that carries oxygenated blood. Name the artery and vein. [HOTS] Answer: The artery which carries deoxygenated blood or blood rich in CO 2 is pulmonary artery while the pulmonary vein is one which carries oxygenated blood. The pulmonary artery carries deoxygenated blood from heart to lungs while pulmonary vein carries oxygenated blood from lungs to heart.

Question 20. Boojho’s uncle was hospitalised and put on dialysis after a severe infection in both of his kidneys. (a) What is dialysis? (b) When does it become necessary to take such a treatment? Answer: The normal functioning of kidney is necessary for good health of a person. But sometime s the kidney may stop working due to infection or injury. This condition of kidney is called kidney failure which may lead to the accumulation of urea in the blood of a person. Since, urea is a toxic substance which must be removed from the blood. Such person having kidney failure cannot survive unless his blood is filtered periodically through the artificial kidney machine to remove urea. The process used for cleaning the blood of a person by separating the waste product urea from it is called dialysis.This machine removes urea and other waste the product periodically.

The long term solution for the patient suffering from kidney failure is kidney transplantation. In this method, the diseased or damaged kidney is removed and matching kidney is donated by a healthy person. The donated kidney is transplanted in its place by performing surgery.

Question 21. The internal structure of heart has four chambers. (a) Name the upper chambers of heart. (b) Name the lower chambers of heart. Answer: The vertical section of heart shows that heart is divided into four compartments called as chambers. (a) The upper two chambers of heart are called atria or atrium. (b) The lower two chambers of heart are called ventricles.

Question 22. Explain in brief the main functions of the structural and functional unit of kidney in excretory system. Answer: Kidney is the major excretory organ which consists of thousands of tiny filters called nephrons. The major functions of nephron are

  • To filter blood at high pressure which helps in the separation of nitrogenous waste such as urea from the blood.
  • It helps in selective re-absorption of some substances (from the initial filtrate which is filtered at a very high pressure). These substances include glucose, amino acid, salts ancf a major amount of water.

Question 23. What is the special feature present in a human heart which does not allow mixing of blood when oxygen-rich and carbon dioxide-rich blood reach the heart? [NCERT Exemplar] Answer: In human, the heart has four chambers. The two upper chambers are called the atria and the two lower chambers are called the ventricles. The partition between the chambers helps to avoid mixing up of blood rich in oxygen with the blood rich in carbon dioxide.

Question 24. Paheli uprooted a rose plant from the soil. Most of the root tips with root hairs got left behind in the soil. She planted it in a pot with new soil and watered it regularly. Will the plant grow or die? Give reason for your answer. [NCERT Exemplar, HOTS] Answer: Possible answers are

  • Without the root hairs, the roots will not be able to absorb water and nutrients and the plant will die.
  • The stem of the rose plant may grow new roots and the plant will live.
  • The rose plant may not be able to survive in a different type of soils.

Transportation in Animals and Plants Class 7 Science Extra Questions Long Answer Type Questions

Question 1. Priya’s grandfather was taken to the hospital as he was unable to perform excretory processes. Priya heard a nurse talking to her father that her grandfather’s has kidney failure and needs to undergo dialysis. Priya later asked her father as to what is dialysis process and why does grandpa needs it. Her father smiles and tells her all the facts associated with this process. (a) What do you mean by dialysis? (b) Why is there a need for dialysis in some people? (c) Excretion is an important life process. How? (d) Which is the major excretory organ in humans? (e) What values do you observe in Priya? [Value Based Question] Answer: (a) Dialysis is the process used for cleaning of the blood by separating the waste products in an artificial medium. (b) Dialysis is needed when the excretory organ of humans, i.e. kidney becomes damaged on unfunctional due to some injury or infection. (c) Excretion process removes the waste products released in body after the utilisation of food and other components. These products are toxic and may harm us if not removed from our body. (d) Kidney (e) Priya is curious, sincere and aware eager to acquire new knowledge.

Question 2. While learning to ride a bicycle, Boojho lost his balance and fell. He got bruises on his knees and it started bleeding. However, the bleeding stopped after sometime. (a) Why did the bleeding stop? (b) What would be the colour of the wounded area and why? (c) Which type of blood cells are responsible for clotting of blood? [NCERT Exemplar] Answer: (a) When a cut or wound starts bleeding after sometime, a clot is formed which plugs the cut and bleeding stops. (b) Wounded area becomes dark red in colour due to clotting of blood. (c) The blood clot is formed due to the presence of the cells called platelets in the blood.

Transportation in Animals and Plants Class 7 Extra Questions Science Chapter 11 9

Absorption and flow of water is a continuous process through the xylem tissue. Xylem tissues are the continuous network of channels which connect roots to the leaves through the stem and branches. It thus transports water and minerals to the leaves of the entire plant.

Transport of Food Material The food manufactured in the leaf is transported to different parts of plants. This transportation of food material from leaves to the other parts of plants is carried out by the tissue called phloem and the process of transport of food material is called translocation. The phloem consists of vessels that are known as sieve tubes.

Transportation in Animals and Plants Class 7 Extra Questions Science Chapter 11 10

2. Veins: These are the blood vessels that carry blood from all the parts of the body back to the heart. These tube-like blood vessels are situated just under the skin and can easily be seen as greenish-blue tubes or lines below the skin. These carry deoxygenated blood from the body parts to heart. Veins have thin walls and blood flows at low pressure through the veins. Therefore, veins have valves in them which allow the blood to flow in one direction and prevent the back flow of blood in veins. Usually veins carry deoxygenated blood but pulmonary vein that is connected to the left atrium of the heart, carries oxygenated blood from the lungs to the heart.

Functions of Blood Various functions of blood are

  • It transports substances like digested food from the small intestine to the other parts of the body.
  • It carries water to all the parts of the body.
  • It carries oxygen and C02 during circulation.
  • It carries waste products like urea from liver to kidney for excretion in urine.
  • It protects the body from disease.

Question 5. While riding a bike, Mason fell from it due to loss of balance. He got up and realised that he was bleeding from several wounds badly. He panicked and started to run but Mansi who was looking at him, stopped him and told him to clean his wound with a clean cloth and that blood will stop coming in a while. Mason noticed that he has stopped bleeding after sometime and a hard covering was appearing on his wounds. (a) Why did the bleeding stop after a while? (b) What is blood and what type of cells are responsible for clotting? (c) What of values do you think Mansi have? [Value Based Question] Answer: (a) Bleeding stops after sometime because some specialised cells start forming a hard covering called clot at the site of wound. (b) Bleeding is a fluid connective tissue present in all parts of the body. Platelets are responsible for formation of clot. (c) Mansi is helpful, knowledgeable and interested in science subject.

Question 6. Read the following terms given below, root hairs xylem urethra arteries kidneys veins atria capillaries heart ureter phloem urinary bladder Group the terms on the basis of the categories given below. (a) Circulatory system of animals. (b) Excretory system in human. (c) Transport of substances in plants. {NCERT Exemplar] Answer: The terms on the basis of the categories can be grouped as follows (a) Circulatory system of human Arteries, atria, capillaries, veins, heart. (b) Excretory system in human Urethra, kidneys, ureter, urinary bladder. (c) Transport of substances in plants Root

Question 7. (a) What are the different blood groups in human? (b) Define blood group compatibility. (c) Make a table to show the donor blood group and recipient blood group. Answer: (a) The blood group of an individual human being always remains unchanged throughout their life. Karl Landsteiner described that human blood can be divided into four groups, i.e. A, B, AB and O. These are named on the basis of substance present in the blood (RBC). Every man has one of these four groups of blood which is inherited from parents to offspring and is never changed.

If a person gets injured and heavy blood loss occurs, there is a need to give blood of other person to the patient. The person who gives the blood is called donor while the person who receives the blood is called recipient.

(b) The process of donation of blood from one person to another is called blood transfusion. Before donation, the blood group must be matched because transfusion of different groups can be dangerous. The RBCs of the patient receiving blood will stick together and may cause death of the patient. This matching of blood group is called blood group compatibility. It can be shown as follows :

A A and AB A and O
B B and AB B and O
AB AB All the group, i.e. A, B, AB and O
O All the group, i.e. A, B, AB and 0 O

Transportation in Animals and Plants Class 7 Science Extra Questions Miscellaneous Questions

Multiple Choice Questions Question 1. The muscular tube through which stored urine is passed out of the body is called (a) kidney (b) ureter (c) urethra (d) urinary bladder Answer: (c) urethra

Question 2. Which among the following contain haemoglobin? (a) Red blood cells (b) White blood cells (c) Both (a) and (b) (d) None of these Answer: (a) Red blood cells

Question 3. They are pipe-like consisting of a group of specialised cells. They transport substances and form a two-way traffic in plants. Which of the following terms qualifies for the features mentioned above? (a) Xylem tissue (b) Vascular tissue (c) Root hairs (d) Phloem tissue Answer: (d) Phloem tissue

Question 4. The organ which controls the blood circulation in body is (a) Liver (b) Lungs (c) Heart (d) Kidney Answer: (c) Heart

Question 5. The absorption of nutrients and exchange of respiratory gases between blood and tissues takes place in [NCERT Exemplar] (a) veins (b) arteries (c) heart (d) capillaries Answer: (d) capillaries

Question 6. A certain type of cells, helps in destruction of disease causing microorganisms are known as (a) thrombocytes (b) white blood cells (c) osteocytes (d) red blood cells Answer: (b) white blood cells

Question 7. In which of the following parts of human body are sweat glands absent? [NCERT Exemplar] (a) Scalp (b) Armpits (c) Lips (d) Palms Answer: (c) Lips

Question 8. The lower chambers of heart is called (a) atria (b) ventricles (c) aorta (d) vena cava Answer: (b) ventricles

Question 9. Aquatic animals like fish excrete their wastes in gaseous form as (a) oxygen (b) hydrogen (c) ammonia (d) nitrogen Answer: (c) ammonia

Question 10. The filtration of blood is done by (a) heart (b) kidney (c) blood (d) urethra Answer: (b) kidney

Question 11. In a tall tree which force is responsible for pulling water and minerals from the soil? [NCERT Exemplar] (a) Gravitational force (b) Transportation force (c) Suction force (d) Conduction force Answer: (c) Suction force

Question 12. Transport of water in plants takes place through (a) xylem (b) vascular bundle (c) phloem (d) None of these Answer: (a) xylem

Fill in the Blanks 1. Blood consists of …………, ……………, …………….. and platelets. 2. Human heartbeats about ………… times per minute in an adult person. 3. ………… and ………… are removed along with water as sweat. 4. ………… are the vessels which carry CO 2 rich blood from body parts to heart. 5. The ………… is an organ which beats continuously to act as a ………… . 6. Heart is located in the ………… . 7. Doctors use ………… as a device to amplify the sound of heart. 8. The parts or organs involved in excretion to form the ………… . 9. Heart has four ………… called as chambers. 10. The function of kidney is to filter the ………… to ………… remove Answer: 1. plasma, RBCs, WBCs 2. 70-80 3. Salt, urea 4. Veins 5. heart, pump 6. chest cavity 7. stethoscope 8. excretory system 9. compartments 10. blood, urea

True/False 1. The vascular tissue for the transport of food in plants is called xylem. 2. The rhythmic contraction and relaxation of heart is called heartbeat. 3. Haemoglobin is the red colour pigment present in blood. 4. Atria are the two upper chambers of the heart. 5. Kidney is a rounded structure used to filter the blood. 6. Platelets help in blood clotting. 7. Digested food, oxygen and CO 2 passes through the walls of the capillaries. 8. Nephrons are the tiny filtering units of the kidney. 9. WBC protects the body from diseases. 10. The process of cleaning the blood of human by using a kidney machine is called dialysis. 11 . Sweat is secreted by sweat glands, present in our skin. Answer: 1. False, the vascular tissue for the transport of food In plant is called phloem. 2. True 3. True 4. True 5. False, kidney filters the blood and is a bean-shaped structure. 6. True 7. True 8. True 9. True 10. True 11. True

Match the Columns

Question 1. Match the Column I with Column II. [NCERT Exemplar]

(a) Right ventricle (i) Pushes blood into the pulmonary artery.
(b) Pulmonary veins (ii) Take deoxygenated blood from the heart to lungs.
(c) Left atrium (iii) Receives blood from different parts of the body.
(d) Pulmonary arteries (iv) Bring oxygenated blood from lungs to the heart.
(e) Left ventricle (v) Pushes blood into the aorta.
(f) Right auricle (vi) Receives deoxygenated blood from the pulmonary veins.

Question 2. Match the Column I with Column II

(a) Circulatory system (i) Deoxygenated blood
(b) Arteries (ii) Heart and blood vessels
(c) Veins (iii) Oxygenated blood
(d) Kidney (iv) Circulation of blood
(e) William Harvey (v) Excretion

Question 3. Match the Column 1 with Column II

(a) Lizards (i) Tube-like structure
(b) Ureters (ii) Blood clotting
(c) Root hairs (iii) Empties blood into the right atrium
(d) Platelets (iv) Largest artery
(e) Aorta (v) Transport of water and minerals
(f) Vena cava (vi) Uric acid

Answers: 1. (a)-(i) (b)-(iv) (c)-(vi) (d)-(ii) (e)-(v) (f)-(iii)

2. (a)-(ii) (b)-(iii) (c)-(i) (d)-(v) (e)-(iv)

3. (a)-(vi) (b)-(i) (c)-(v) (d)-(ii) (e)-(iv) (f)-(iii)

Extra Questions for Class 7 Science

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Class 7 Science Chapter 7 HOTS Questions - Transportation in Animals and Plants

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Q1: Why do we get relief from cramps after a hot water bath or a massage?

Ans: Hot water bath or massage improves circulation of blood. As a result, the supply of oxygen to the muscle cells increases. The increase in the supply of oxygen results in the complete breakdown of lactic acid into carbon dioxide and water. Thus, we get relief from cramps after a hot water bath or a massage.

Q2: Veins have valves which allow blood to flow only in one direction. Arteries do not have valves. Yet the blood flows in one direction only. Can you explain why? Ans: Veins have valves to prevent blood from flowing backwards and pooling, whereas arteries pump blood at very high pressures, which naturally prevents back flow Q3: Kidneys are the major excretory organs in humans. How will the waste products released will be excreted out if the kidneys are damaged or unfunctional? Ans:  Artificial ways of waste removal are used like dialysis which are referred to as artificial kidneys. Q4: Why does an athlete breathe faster and deeper than usual after finishing the race?

Ans: An athlete breathes faster and deeper after a race because their body needs more oxygen to produce energy. During the race, the muscles use up oxygen quickly and can even start working without enough oxygen for a short time. After the race, faster and deeper breathing helps bring in more oxygen to break down food and release more energy, helping the body recover. Q5: What is the relation between the rate of heartbeat and pulse rate? If a pulse rate of an athlete Is 96/min, what will be the number of his heartbeat at the same time? Ans: 

  • The rhythmic contraction and relaxation of the muscles of the heart is called heartbeat. Whereas, the rhythmical throbbing of the arteries as the blood is pushed forward through them is called pulse. It can be felt in the wrist, temples, etc.
  • Pulse rate is the number of heartbeats per minutes. The number of heartbeat is equal to the number of pulse per minute.

Therefore, if a pulse rate of an athlete is 96/min then the number of his heartbeat at the same time will also be 96/min Q6: Paheli noticed water being pulled up by a motor pump to an overhead tank of a five storeyed building. She wondered how water moves up to great heights in the tall trees standing next to the building. Can you tell why? Ans:  When the water is pulled up by a motor-pump to an overhead tank of a five storeyed building, it moves to a great height due to the suction pull. This pull forms the continuous column of water and water rises up to a great height. Similarly, when transpiration occurs in the plants, water is evaporated and this creates a suction pull in the plants. Q7: Paheli says her mother puts ladyfinger and other vegetables in water if they are somewhat dry. She wants to know how water enters into them. Ans: By soaking the vegetables in water, the skin of the vegetables becomes moist and water starts moving from one cell to another until the vegetables are fresh again. Q8: List some animals surrounding your locality group them into following groups. (a) Animals that excrete ammonia in gaseous forms. (b) Animals that excrete uric acid in the form of pellets. (c) Animals that excrete urea in the form urine. Ans: Some animals that surround us are fish, frog, birds, tadpole larva, snake, cow, man, rat, monkey, lizard, toad and snail. These can be grouped as follows (a) Animals that excrete ammonia in gaseous form (i.e. ammonotelics)-Fish, tadpole larva. (b)  Animals that excrete uric acid in the form of pellets (i.e. uricotelics)—Bird, snake, rat, lizard, snail. (c) Animals that excrete urea in the form of urine (i.e. ureotelics)-Frog, cow, man, monkey, toad. Q9: Human have two major organs that perform transport of materials. Organ ‘A’ is bean-shaped and dark red in colour lie just above the waist. It helps in’ removal of ‘Q’, a waste material from blood. The organ ‘S’ is the opening at the end of the urinary bladder through which the waste material is eliminated. Organ ‘B’ lies in the chest cavity slightly tilted towards the left side. It pumps continuously and pours liquid ‘C’ into arteries and through very fine tube-like structure ‘D’ distributes the liquid to various parts of the body. What are the name of these organs. Ans:  Organ ‘A’ is kidney which is bean-shaped and helps in the removal of urea (Q) which is a waste material from the blood. ‘S’ is urethra which is the small opening at the end of urinary bladder. Organ ‘B’ is heart which acts as pump. It pumps liquid blood continuously and pours into arteries, and through capillaries (D) which are fine tube-like structure, the blood is distributed to various parts of the body. Q10: The major function of the arteries is to carry to oxygenated blood throughout the body and that of veins is to carry deoxygenated blood from body parts to heart for purification. There is one artery that carries deoxygenated blood and one vein that carries oxygenated blood. Name the artery and vein. Ans:  The artery which carries deoxygenated blood or blood rich in CO 2 is pulmonary artery while the pulmonary vein is one which carries oxygenated blood. The pulmonary artery carries deoxygenated blood from heart to lungs while pulmonary vein carries oxygenated blood from lungs to heart. Q11: Paheli uprooted a rose plant from the soil. Most of the root tips with root hairs got left behind in the soil. She planted it in a pot with new soil and watered it regularly. Will the plant grow or die? Give reason for your answer. Ans: Possible answers are:

  • Without the root hairs, the roots will not be able to absorb water and nutrients and the plant will die.
  • The stem of the rose plant may grow new roots and the plant will live.
  • The rose plant may not be able to survive in a different type of soils.

Class 7 Science Chapter 7 HOTS Questions - Transportation in Animals and Plants

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case study on transportation in animals and plants class 7

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7th Class Science Transportation in Animals and Plants Question Bank

Done transportation in animals and plants total questions - 118.

Question Bank

question_answer 1) The aroma of food comes from the kitchen because of-

A) Osmosis                       done clear

B) Diffusion done clear

C) Convection                  done clear

D) Fragmentation done clear

question_answer 2) One of our body organs is used to filter waste products of the blood.

A) Heart              done clear

B) Lungs done clear

C) Kidney            done clear

D) Stomach done clear

question_answer 3) A kidney, ureter and urinary bladder together are called-

A) Respiratory system       done clear

B) Excretory system done clear

C) Circulatory system done clear

D) Reproductive system done clear

question_answer 4) Cardiovascular system is also known as

A) Digestive system          done clear

C) Circulatory system       done clear

D) Nervous system done clear

question_answer 5) The part of blood which does not have a nucleus.

A) RBC               done clear

B) WBC done clear

C) Platelets           done clear

D) Plasma done clear

question_answer 6) The vascular tissue which conducts food to various plant parts is the

A) Xylem             done clear

B) Phloem done clear

C) both of these                done clear

D) none of these done clear

question_answer 7) The pulmonary arteries carry

A) pure blood                   done clear

B) impure blood done clear

C) blood to kidney            done clear

D) blood from the kidney done clear

question_answer 8) The blood vessel which carries blood from lungs to heart is called

A) Pulmonary artery         done clear

B) Coronary artery done clear

C) Renal artery                 done clear

D) Pulmonary vein done clear

question_answer 9) Select the type of cells, present in blood, whose main function is to fight against diseases by destroying harmful bacteria and other foreign material.

A) RBC                            done clear

question_answer 10) The process by which the oxygenated blood moves from left auride to left ventricle and then through aorta to all parts of the body is known as

A) Extracellular circulation done clear

B) Pulmonary circulation done clear

C) Systemic circulation done clear

D) Intracellular circulation done clear

question_answer 11) Which of the following is responsible for the red colour of red blood cells?

A) blood              done clear

B) Haemoglobin done clear

C) platelets           done clear

question_answer 12) Select the one that is a small muscular balloon like organ, which swells up when it is fall of urine and shrinks in size again after urine has been emptied out of it.

A) ureter                           done clear

B) urinary bladder done clear

C) urethra                         done clear

question_answer 13) Which of the following plays the major role in clotting of blood?

C) Platelets            done clear

question_answer 14) The clotting of blood is to

A) Slow down the movement of blood inside the blood vessel. done clear

B) trap oxygen inside the blood so that it may be transported more easily. done clear

C) seal up wounds to avoid loss of blood done clear

D) all the above are correct done clear

question_answer 15) Which of the following groups represent correctly the substances that the capillaries exchange between blood and tissues?

A) oxygen, carbon dioxide, RBC, food done clear

B) Oxygen, carbon dioxide, food, waste products done clear

C) water, plasma, WBC, RBC done clear

D) Oxygen, carbon dioxide, WBC, RBC done clear

question_answer 16) Which of the following mechanisms is not used by human beings for excretion of waste materials from their bodies?

A) Exhalation                   done clear

B) Perspiration done clear

C) Defecation                   done clear

D) Transfusion done clear

question_answer 17) By whom was the circulation of blood discovered?

A) Galileo Galilie              done clear

B) William Harvey done clear

C) Both of these                done clear

question_answer 18) In plants which of the following is used for absorption of water?

B) phloem done clear

C) stomata                        done clear

D) root hair done clear

question_answer 19) The transportation of water takes place through a large spaced potato cavity filled with sugar solution placed in a dish containing small amount of water?

A) Xylem done clear

C) through movement of one cell to another done clear

question_answer 20) The process of filtering the waste containing body fluids is carried out by blood capillaries in which of the following parts of our body?

A) urinary bladder            done clear

B) kidneys done clear

C) trachea            done clear

D) atria done clear

question_answer 21) The blood that flows from lungs to heart is bright red, because

A) it is made red by oxygen done clear

B) it is made red by carbon dioxide done clear

C) it is made red by gastric juices done clear

D) the lungs add a pigmient (dye) to blood as it flows through them done clear

question_answer 22) The heart rate of an adult is

A) 60-65 per minute         done clear

B) 70-80 per minute done clear

C) 40-60 per minute         done clear

question_answer 23) Root hairs are of utmost importance to the plant because

A) they provide anchorage done clear

B) they provide much absorptive surface done clear

C) they are the centres of cell division and growth done clear

D) they are the areas where root grows. done clear

question_answer 24) An instrument for measuring rate of transpiration is a

A) photometer                  done clear

B) kilometer done clear

C) hygrometer                   done clear

D) osmometer done clear

question_answer 25) Oxygen is carried to the tissues of an insect by

B) gills done clear

C) lungs                done clear

D) trachea done clear

question_answer 26) Which of the following is a tissue and not an organ?

A) Kidney             done clear

B) Stretched muscle done clear

C) Liver                            done clear

D) Spleen done clear

question_answer 27) The greatest effort of the heart is exerted by the

A) right auricle                  done clear

B) right ventricle done clear

C) left auricle                    done clear

D) left ventricle done clear

question_answer 28) Arterial blood may be distinguished from venous blood because the latter is

A) a dull red                      done clear

B) a brighter red done clear

C) thicker             done clear

D) thinner done clear

question_answer 29) A pulse at the wrist is detected in a

A) systemic vein   done clear

B) systemic artery done clear

C) pulmonary vein            done clear

D) Pulmonary artery done clear

question_answer 30) The name of the tube which leads from kidney to the urinary bladder is

A) uriniferous tubule         done clear

B) urethra done clear

C) ureter               done clear

question_answer 31) Reproduction is described as a phenomenon by which of these options?

A) increase in size done clear

B) increase in number done clear

C) form new tissues and organs done clear

D) develop from zygotes done clear

question_answer 32) It is present in the respiratory system of insects, fish and mammals. It is

A) spirades                       done clear

B) tracheae done clear

C) a thin moist surface     done clear

D) all of these done clear

question_answer 33) It is produced when muscle cells respire anaerobically. Its accumulation causes cramps. It is

A) Alcohol                        done clear

B) Tartaric acid done clear

C) Lactic acid      done clear

D) Oxalic acid done clear

question_answer 34) These are tiny, irregular, star shaped structures that have no nuclei but they play an important roll in clotting of blood. These are

A) RBC                            done clear

C) Platelets       done clear

question_answer 35) It generates a force which pulls up water absorbed by the roots from the soil to reach the stem and leaves. It is

A) transpiration                done clear

B) transportation done clear

C) stomata            done clear

question_answer 36) It is a part of our circulatory system and is situated in our chest cavity. It is

A) blood                           done clear

B) heart done clear

C) kidney                          done clear

question_answer 37) The main organ of excretory system through which waste material (in the form of urine) is eliminated from the body. It is

A) kidney              done clear

B) sweat gland done clear

C) urine                            done clear

question_answer 38) Plasma is

A) blood done clear

B) fluid part of blood done clear

C) red pigment present in blood done clear

question_answer 39) Arteries are a type of blood vessel

A) which carry oxygen rich blood from the heart to all other parts of the body. done clear

B) which carry deoxygenated blood from the heart to all other parts of the body. done clear

C) which carry deoxygenated blood and have thick elastic units. done clear

D) none of the above is correct. done clear

question_answer 40) Stethoscope is a device that is used by doctors to

A) amplify the sound of the heart done clear

B) check for diseases a patient is suffering from done clear

C) to check for any type of infection in the body of the patient done clear

Column-I Column-II
(A) Deoxygenated blood from body flows to it (i) Right auricle
(B) Deoxygenated blood from it flows to lungs (ii) Right ventricle
(C) Oxygenated blood from lungs flow to it (iii) Left auricle
(D) Oxygenated blood form it flows to body (iv) Left ventricle

A) (A) \[\to \] (i), (B) \[\to \] (ii), (C) \[\to \] (iii), (D) \[\to \] (iv) done clear

B) (A) \[\to \] (ii), (B) \[\to \] (i), (C) \[\to \] (iii), (D) \[\to \] (iv) done clear

C) (A) \[\to \] (i), (B) \[\to \] (ii), (C) \[\to \] (iv), (D) \[\to \] (iii) done clear

D) (A) \[\to \] (ii), (B) \[\to \] (i), (C) \[\to \] (iv), (D) \[\to \] (iii) done clear

Column-I Column-II
(A) Xylem (i) transpiration
(B) Pholem (ii) transport of food
(C) Root hairs (iii) transport of water
(D) Stomata (iv) Absorption of water

B) (A) \[\to \] (ii), (B) \[\to \] (iii), (C) \[\to \] (i), (D) \[\to \] (iv) done clear

C) (A) \[\to \] (iii), (B) \[\to \] (ii), (C) \[\to \] (iv), (D) \[\to \] (i) done clear

D) (A) \[\to \] (iii), (B) \[\to \] (ii), (C) \[\to \] (i), (D) \[\to \] (iv) done clear

Column - I Column - II
(A) Plasma (i) Blood vessel
(B) Hemoglobin (ii) fluid part of blood
(C) Platelets (iii) Binds with oxygen and transports it to all parts of the body
(D) Artery (iv) help in formation of clot

B) (A) \[\to \] (ii), (B) \[\to \] (iii), (C) \[\to \] (iv), (D) \[\to \] (i) done clear

C) (A) \[\to \] (iii), (B) \[\to \] (iv), (C) \[\to \] (i), (D) \[\to \] (ii) done clear

D) (A) \[\to \] (iv), (B) \[\to \] (i), (C) \[\to \] (ii), (D) \[\to \] (iii) done clear

Column-I Column-II
(A) Kidneys (p) Air
(B) Heart (q) Food
(C) Lungs (r) Blood
(D) Stomach (s) Wastes

A) (A) \[\to \] (p), (B) \[\to \] (r), (C) \[\to \] (s), (D) \[\to \] (q) done clear

B) (A) \[\to \] (s), (B) \[\to \] (r), (C) \[\to \] (p), (D) \[\to \] (q) done clear

C) (A) \[\to \] (r), (B) \[\to \] (p), (C) \[\to \] (s), (D) \[\to \] (q) done clear

D) (A) \[\to \] (q), (B) \[\to \] (s), (C) \[\to \] (p), (D) \[\to \] (r) done clear

question_answer 45) DIRECTIONS: Read the Passage (s) given below and answer the questions that follow. Passage - 1 Our blood consists of various types of cells. It is a liquid which has various types of cells suspended in it. It contains RBC, WBC, plasma and platelets. They have different functions to perform. Which of the following contains the pigment that binds oxygen and transports it to all parts of the body?

C) Plasma                         done clear

D) platelets done clear

question_answer 46) DIRECTIONS: Read the Passage (s) given below and answer the questions that follow. Passage - 1 Our blood consists of various types of cells. It is a liquid which has various types of cells suspended in it. It contains RBC, WBC, plasma and platelets. They have different functions to perform. Which component of blood helps to fight against germs that may enter our body?

A) RBC                            done clear

C) both of these                done clear

question_answer 47) DIRECTIONS: Read the Passage (s) given below and answer the questions that follow. Passage - 1 Our blood consists of various types of cells. It is a liquid which has various types of cells suspended in it. It contains RBC, WBC, plasma and platelets. They have different functions to perform. The fluid part of blood is called

A) plasma             done clear

B) platelets done clear

question_answer 48) DIRECTIONS: Read the Passage (s) given below and answer the questions that follow. Passage - 2 Plants have pipe-like vessels made up of special cells, forming the vascular tissues, for transport of water and nutrients from the soil. These vascular tissues are called xylem. The transportation of food is done by vascular tissues called phloem. Which of the following are involved in transport of substances in plants?

A) Xylem                          done clear

C) both of these                done clear

question_answer 49) DIRECTIONS: Read the Passage (s) given below and answer the questions that follow. Passage - 2 Plants have pipe-like vessels made up of special cells, forming the vascular tissues, for transport of water and nutrients from the soil. These vascular tissues are called xylem. The transportation of food is done by vascular tissues called phloem. The vascular tissue for transport of water and nutrients in plants is called

A) Xylem              done clear

question_answer 50) DIRECTIONS: Read the Passage (s) given below and answer the questions that follow. Passage - 2 Plants have pipe-like vessels made up of special cells, forming the vascular tissues, for transport of water and nutrients from the soil. These vascular tissues are called xylem. The transportation of food is done by vascular tissues called phloem. The continuous network of channels that connects roots to the leaves through the stem and branches is

A) root hair          done clear

B) xylem done clear

C) phloem             done clear

question_answer 51) DIRECTIONS: Read the Passage (s) given below and answer the questions that follow. Passage - 3 The evaporation of water from leaves generates a suction pull which can pull water to great heights in tall trees. What is the name of the process described in the passage?

A) Evaporation                 done clear

B) Suction done clear

C) Transpiration       done clear

D) Transportation done clear

question_answer 52) DIRECTIONS: Read the Passage (s) given below and answer the questions that follow. Passage - 3 The evaporation of water from leaves generates a suction pull which can pull water to great heights in tall trees. Movement of sap through the plant is facilitated by

A) absorption by roots done clear

B) gravitational force done clear

C) transpiration pull and absorption by roots done clear

D) height of sap done clear

question_answer 53) DIRECTIONS: Read the Passage (s) given below and answer the questions that follow. Passage - 3 The evaporation of water from leaves generates a suction pull which can pull water to great heights in tall trees. Water and minerals move to other parts of plant through

A) xylem          done clear

C) blood vessels                done clear

D) stomata done clear

question_answer 54) DIRECTIONS: Read the Passage (s) given below and answer the questions that follow. Passage - 4 The main organ of the human excretory system through which waste material is eliminated from the body is kidney. What is the major excretory product in humans?

A) Sweat             done clear

B) water done clear

C) urea                 done clear

D) salt done clear

question_answer 55) DIRECTIONS: Read the Passage (s) given below and answer the questions that follow. Passage - 4 The main organ of the human excretory system through which waste material is eliminated from the body is kidney. Sweat contains

A) urea                 done clear

B) sodium chloride done clear

C) water              done clear

question_answer 56) DIRECTIONS: Read the Passage (s) given below and answer the questions that follow. Passage - 4 The main organ of the human excretory system through which waste material is eliminated from the body is kidney. Which of the following is used as artificial kidney in kidney failure patients?

A) Dialysis            done clear

B) Filter done clear

C) Angiogram                   done clear

D) Ventilation done clear

question_answer 57) DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion A" and the other labelled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below Assertion (A): Heart is a tissue which acts as a pump. Reason (R): Heart is roughly the size of your fist.

A) Both A and R are true and R is the correct explanation of A. done clear

B) Both A and R are true but R is not the correct explanation of A. done clear

C) A is true but R is false. done clear

D) A is false but R is true. done clear

question_answer 58) DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion A" and the other labelled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below Assertion (A): The rhythmic beating of various chambers of the heart maintain circulation of blood. Reason (R): Pulse rate per minute indicates the rate of heartbeat.

question_answer 59) DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion A" and the other labelled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below Assertion (A): Animals like sponges and Hydra do not possess any fluid like blood. Reason (R): Sponges and Hydra lack a circulatory system.

question_answer 60) DIRECTIONS: The questions in this segment consists of two statements, one labelled as "Assertion A" and the other labelled as "Reason R". You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below Assertion (A): Several droplets of water are seen on the edges of leaves of roses in the morning. Reason (R): We give water to rose plants and some water falls on the leaves.

question_answer 61) DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) Arteries have no muscular walls (ii) Veins carry blood from different parts of the body to the heart.

A) Statement (i) is correct while statement (ii) is incorrect. done clear

B) Statement (ii) is correct while statement (i) is incorrect. done clear

C) Both statements are correct done clear

D) Both statements are incorrect. done clear

question_answer 62) DIRECTIONS: Read the following two statements carefully and choose the correct options. (i)  Ureters connect the kidneys to the urinary bladder. (ii) Ureters filter the blood and collect wastes in kidneys.

question_answer 63) DIRECTIONS: Read the following two statements carefully and choose the correct options. (i)  Sap contains water, plasma and minerals (ii) Transport system in most autotrophs is blood circulation.

question_answer 64) DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) In unicellular organisms transportation occur by diffusion and streaming movements of the cytoplasm. (ii) Humans beings transport nutrients, gases etc. by blood.

A) A                                  done clear

B) B done clear

C) C                                 done clear

D) D done clear

A) A = left atrium, B = valve done clear

B) A = septum, B = right ventricle done clear

C) A = right atrium, B = aorta done clear

D) A = left atrium, B = septum done clear

question_answer 67) How many times does the average adult heart beat per minute while at rest?

A) 40                                done clear

B) 120 done clear

C) 70              done clear

D) 90 done clear

question_answer 68) A pulse is caused by

A) the valves in an artery opening and closing done clear

B) oxygen entering the blood in the lungs done clear

C) changes in blood pressure in an artery done clear

D) red blood cells colliding with each other in the arteries done clear

A) Phloem            done clear

B) Leaf done clear

C) Stomata                       done clear

D) Xylem done clear

question_answer 70) An organ which pumps deoxygenated blood to the lungs and oxygenated blood to the body.

A) Kidney            done clear

B) Heart done clear

C) Lung                            done clear

D) Vein done clear

question_answer 71) In flatworms like Helicometra the circulator system is ________.

A) Open circulatory system done clear

B) Closed circularly system done clear

C) Absent done clear

D) None of the above done clear

question_answer 72) Heart is four chambered in case of-

A) Aves and mammals     done clear

B) Amphibians done clear

C) Reptilians                     done clear

D) Cephalopods done clear

question_answer 73) Which is protein part of the blood

A) Erythrocytes                 done clear

B) Leukocytes done clear

C) Platelets                       done clear

question_answer 74) A genetic illness that causes a disinfection in one of the blood clotting mechanism

A) Anemia                        done clear

B) Hemophilia done clear

C) Leukemia                     done clear

D) Thrombophilia done clear

question_answer 75) A fibrous, non-globular protein which is involved in the clotting mechanism-

A) Anemia           done clear

question_answer 76) Mummy has put some grain seeds in a tumbler and poured some water on it in the night. In the morning she saw that gram seeds has swollen up. Can you say why this has happened?

A) because of osmosis done clear

B) because of turgor pressure done clear

C) because of diffusion done clear

D) because of transpiration done clear

question_answer 77) These have thin and elastic walls-

A) Arteries                        done clear

B) Veins done clear

C) Capillaries                   done clear

D) Superior vena cava done clear

question_answer 78) Relaxation of the heart muscle is called as

A) Diastole      done clear

B) Pulse done clear

C) Systole                         done clear

D) Heartbeat done clear

question_answer 79) Ammonotelism is basically found in which type of animals-

A) Mammals                     done clear

B) Aves done clear

C) Aquatic          done clear

D) Reptilia done clear

question_answer 80) Mineral, water, lactate and urea are present in-

A) Our sweat       done clear

B) Our kidney done clear

C) Out lungs                     done clear

D) Our ureter done clear

question_answer 81) Mesoglea is present in-

A) Sponges          done clear

B) Hydra done clear

C) Spirogyra                     done clear

D) Vaucheria done clear

question_answer 82) Which part of the blood transport the waste product urea from the liver to the kidney.

A) Red Blood cells            done clear

B) White Blood cells done clear

C) Plasma done clear

D) Platelets done clear

question_answer 83) Throbbing that occurs in arteries due to flowing of blood is called as-

A) heart beat                    done clear

B) pulse done clear

C) blood circulation          done clear

D) pulmonary circulation done clear

question_answer 84) An opening in xylem vessel through which lot of water can pass through.

A) Lignin             done clear

B) Lumen done clear

C) Lamella                        done clear

D) Stomata done clear

question_answer 85) An elongated, tube like dead cell with thick and lignified wall which possess large cell cavity.

A) plasmodesmata            done clear

B) Tracheid?s done clear

C) xylem vessel                 done clear

D) sieve tube done clear

question_answer 86) The process of carrying food material from leaf to different parts of the plant is called -

A) Transportation             done clear

B) Transpiration done clear

C) Translocation     done clear

D) Diffusion done clear

question_answer 87) A granulocytes and Granulocytes are those having nuclei. Can you tell these are parts of which type of blood?

A) Leukocytes     done clear

B) Erythrocytes done clear

C) Thrombocytes              done clear

D) Blood platelet done clear

question_answer 88) Dead, complex permanent tissue present in the plant.

A) Phloem vessel              done clear

B) Xylem vessel done clear

C) Sieve tube                    done clear

D) Companion cell done clear

question_answer 89) Nitrogen, phosphorus, potassium, sulphur are some nutrients which plants get from the soil. These nutrients are called ______.

A) Micronutrients              done clear

B) Macronutrients done clear

C) Minerals                       done clear

D) Carbohydrates done clear

question_answer 90) Which type of pressure is responsible for the rise of water to some height?

A) Turgor pressure            done clear

B) Root pressure done clear

C) Osmotic pressure         done clear

D) Atmospheric pressure done clear

A) collateral                      done clear

B) Bicollateral done clear

C) Amphicrihral                done clear

D) Amphivasal done clear

question_answer 92) In between xylem and phloem there is a layer called _______.

A) Meristem                      done clear

B) Medulla done clear

C) Cambium          done clear

D) Midrib done clear

question_answer 93) In sieve tube of phloem which sugar is dissolved in \[{{H}_{2}}O\] to form sap

A) Fructose          done clear

B) Glucose done clear

C) Sucrose         done clear

D) Cellulose done clear

question_answer 94) Why is blood that flows from lungs to the heart bright red rather than dark red?

A)  \[\text{C}{{\text{O}}_{\text{2}}}\] makes it red done clear

B) Oxygen makes it red done clear

C) Gastric juices make it red done clear

D) Lungs add a pigment to blood done clear

Column-I Column-II
(A) RBC (p) clotting
(B) WBC (q) transportation
(C) Platelets (r) Carries\[{{\text{O}}_{\text{2}}}\]& \[\text{C}{{\text{O}}_{\text{2}}}\]
(D) plasma (s) protects the body

A) (A) \[\to \] (s), (B) \[\to \] (p), (C) \[\to \] (q), (D) \[\to \] (r) done clear

B) (A) \[\to \] (p), (B) \[\to \] (r), (C) \[\to \] (s), (D) \[\to \] (q) done clear

C) (A) \[\to \] (q), (B) \[\to \] (p), (C) \[\to \] (r), (D) \[\to \] (s) done clear

D) (A) \[\to \] (r), (B) \[\to \] (s), (C) \[\to \] (p), (D) \[\to \] (q) done clear

Column-I Column-II
(A) Nephrons (p) heart
(B) auricle (q) urinary bladder
(C) xylem (r) Kidney
(D) urine (s) Plant

A) (A) \[\to \] (r), (B) \[\to \] (p), (C) \[\to \] (s), (D) \[\to \] (q) done clear

B) (A) \[\to \] (q), (B) \[\to \] (r), (C) \[\to \] (p), (D) \[\to \] (s) done clear

C) (A) \[\to \] (p), (B) \[\to \] (q), (C) \[\to \] (s), (D) \[\to \] (r) done clear

D) (A) \[\to \] (r), (B) \[\to \] (q), (C) \[\to \] (s), (D) \[\to \] (p) done clear

Column-I Column-II
(A) RBC (p) fist size
(B) urinary bladder (q) bean shaped
(C) Kidney (r) balloon shaped
(D) Heart (s) disc shaped

A) (A) \[\to \] (q), (B) \[\to \] (r), (C) \[\to \] (s), (D) \[\to \] (p) done clear

B) (A) \[\to \] (s), (B) \[\to \] (q), (C) \[\to \] (s), (D) \[\to \] (q) done clear

C) (A) \[\to \] (s), (B) \[\to \] (r), (C) \[\to \] (q), (D) \[\to \] (p) done clear

D) (A) \[\to \] (p), (B) \[\to \] (q), (C) \[\to \] (r), (D) \[\to \] (s) done clear

Column-I Column-II
(A) xylem (p) companion cells
(B) phloem (q) root hairs
(C) Stomata (r) tracheid?s
(D) Root (s) guard cells

A) (A) \[\to \] (s), (B) \[\to \] (r), (C) \[\to \] (p), (D) \[\to \] (q) done clear

B) (A) \[\to \] (r), (B) \[\to \] (p), (C) \[\to \] (s), (D) \[\to \] (q) done clear

C) (A) \[\to \] (q), (B) \[\to \] (s), (C) \[\to \] (r), (D) \[\to \] (p) done clear

D) (A) \[\to \] (p), (B) \[\to \] (q), (C) \[\to \] (s), (D) \[\to \] (r) done clear

question_answer 99) DIRECTIONS: Read the passage (s) given below and answer the questions that follow Passage - 1 Heart is an organ which beats continuously to act as a pump for transport of blood, which carries other substances. The heart is located in the chest cavity with its lower tip slightly tilted towards the left. Your heart is roughly the size of your fist. To avoid the mixing of blood rich in oxygen and the blood rich in carbon dioxide, the heart has

A) two atria          done clear

B) two ventricles done clear

C) four chambers   done clear

question_answer 100) DIRECTIONS: Read the passage (s) given below and answer the questions that follow Passage - 1 Heart is an organ which beats continuously to act as a pump for transport of blood, which carries other substances. The heart is located in the chest cavity with its lower tip slightly tilted towards the left. Your heart is roughly the size of your fist. When arteries reach the tissues, they divide into

A) capillaries        done clear

B) tubules done clear

C) veins                            done clear

question_answer 101) DIRECTIONS: Read the passage (s) given below and answer the questions that follow Passage - 1 Heart is an organ which beats continuously to act as a pump for transport of blood, which carries other substances. The heart is located in the chest cavity with its lower tip slightly tilted towards the left. Your heart is roughly the size of your fist. Pulse is due to

A) blood flowing is arteries done clear

B) blood flowing in veins done clear

C) blood flowing through capillaries done clear

question_answer 102) DIRECTIONS: Read the passage (s) given below and answer the questions that follow Passage - 2 The process of waste disposal or removal of wastes is called excretion. In plants, water and salts are absorbed by roots and carried by xylem. Plants store some waste products. These are useful to us. Where do plants store their wastes?

A) Old leaves                    done clear

B) Vacuoles done clear

C) Both (a) and (b)           done clear

D) None of these done clear

question_answer 103) DIRECTIONS: Read the passage (s) given below and answer the questions that follow Passage - 2 The process of waste disposal or removal of wastes is called excretion. In plants, water and salts are absorbed by roots and carried by xylem. Plants store some waste products. These are useful to us. The cause of movement of water against gravity in a plant is

A) Osmosis done clear

B) photosynthesis done clear

C) transpiration done clear

D) excretion done clear

question_answer 104) DIRECTIONS: Read the passage (s) given below and answer the questions that follow Passage - 2 The process of waste disposal or removal of wastes is called excretion. In plants, water and salts are absorbed by roots and carried by xylem. Plants store some waste products. These are useful to us. The solution of minerals, water, food and gases that is carried through xylem and phloem is called

A) sol                                done clear

B) Sap done clear

C) cytoplasm                    done clear

D) protoplasm done clear

question_answer 105) DIRECTIONS: Read the passage (s) given below and answer the questions that follow Passage - 3 Excretory system varies in different animals some animals live in water and so their waste product is ammonia which directly dissolve in water. Which animals excrete wastes in the form of ammonia?

A) humans                        done clear

B) birds done clear

C) fish                               done clear

question_answer 106) DIRECTIONS: Read the passage (s) given below and answer the questions that follow Passage - 3 Excretory system varies in different animals some animals live in water and so their waste product is ammonia which directly dissolve in water. What is the major excretory product in humans?

A) uric acid                      done clear

B) urea done clear

C) ammonia                     done clear

D) All of these done clear

question_answer 107) DIRECTIONS: Read the passage (s) given below and answer the questions that follow Passage - 3 Excretory system varies in different animals some animals live in water and so their waste product is ammonia which directly dissolve in water. Where are kidneys located in humans?

A) chest done clear

B) abdomen done clear

C) hands done clear

D) left side of the body done clear

question_answer 108) DIRECTIONS: The questions in this segment consists of two statements, one labeled as ?Assertion A? and the other labeled as ?Reason R?. You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): Circulatory system consists of the heart, the lungs and blood vessels. Reason (R): Blood is a fluid which flows in blood vessels.

question_answer 109) DIRECTIONS: The questions in this segment consists of two statements, one labeled as ?Assertion A? and the other labeled as ?Reason R?. You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): Arteries have a thick elastic wall. Reason (R): In arteries blood flow is rapid and at high pressure

B) Both A and R are true but R is not the correct explanation of A, done clear

question_answer 110) DIRECTIONS: The questions in this segment consists of two statements, one labeled as ?Assertion A? and the other labeled as ?Reason R?. You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): Pulmonary artery carries impure blood to the lungs Reason (R): Pulmonary vein carries impure blood from lungs to heart.

question_answer 111) DIRECTIONS: The questions in this segment consists of two statements, one labeled as ?Assertion A? and the other labeled as ?Reason R?. You are to examine these two statements carefully and decide if the Assertion A and Reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using codes given below. Assertion (A): water absorbed by roots from the soil reaches the top of all trees. Reason (R): The force generated during transpiration helps to pull the water up.

question_answer 112) DIRECITONS: Read the following three statements and choose the correct answer. (i) Lower chambers of the heart are called auricles (ii) Upper chambers of the heart are called ventricles. (iii) These are no values in a heart.

A) Statement (i) and (iii) are incorrect but (ii) is correct done clear

B) Statement (i) and (ii) are incorrect but (iii) is correct done clear

C) All statements are correct done clear

D) All statements are incorrect done clear

question_answer 113) DIRECITONS: Read the following three statements and choose the correct answer. (i) Gas exchange in the alveoli happens through capilaries. (ii) Oxygenated blood is pumped to all other parts of the body from left ventricle. (iii) Arteries have thicker walls than veins

question_answer 114) DIRECITONS: Read the following three statements and choose the correct answer. (i) Calcium is needed for haemoglobin formation (ii) R B Cs is red due to haemoglobin (iii) Protein part in haemoglobin is haeme

A) Aorta done clear

B) vein done clear

C) Pulmonary artery         done clear

A) veins                done clear

B) Aorta done clear

A) P = urethra, Q = renal vein done clear

B) P = urethra, Q = bladder done clear

C) P = urethra, Q = renal vein done clear

D) P= ureter, Q= kidney done clear

A) A = warm air, B = normal, C = cool air done clear

B) A = normal, B = cool air, C = warm air done clear

C) A = cool air, B = normal, C = warm air done clear

D) A = normal, B = warm air, C = cool air done clear

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  • CBSE Notes For Class 7
  • CBSE Class 7 Science Notes
  • Chapter 11: Transportation In Animals And Plants

Transportation in Animals and Plants Class 7 Science Notes - Chapter 11

According to the CBSE Syllabus 2023-24, this chapter has been renumbered as Chapter 7.

Introduction

Circulatory system.

The organ system of the body that is responsible for the  transport of material throughout the body is called the circulatory system .
  • The materials transported are nutrients, oxygen, carbon dioxide, cells, etc.
  • The medium of transportation is blood.
  • The primary parts of the circulatory system are the heart, arteries and veins.

For more information on Human Circulatory System, watch the below video

case study on transportation in animals and plants class 7

  • Blood is a fluid tissue that transports nutrients and oxygen to the cells and carries away carbon dioxide and other waste products in our bodies.
  • The fluid part of blood is called plasma and has various salts and nutrients dissolved in it.
  • Blood cells are suspended in plasma, and they are Red Blood Cells (RBCs), White Blood Cells (WBCs) and Platelets.
  • Plasma is the liquid component of the blood in which most of the blood cells are suspended.
  • It is mostly made up of water (up to 95%) and contains dissolved nutrients, carbon dioxide and oxygen.
  • Red blood cells (RBC) present in the blood are responsible for the transport of oxygen throughout the body.
  • They contain a red pigment called haemoglobin, which binds with oxygen.
  • The reddish colour of the blood is due to haemoglobin.
  • The blood contains white blood cells (WBC), which are part of the immune system.
  • They are like soldiers who fight and kill germs that may enter the body.

Blood Platelets

  • Platelets are the smallest cells in the blood.
  • By clumping together, they form a blood clot, preventing the loss of blood due to bleeding.
  • They prevent excessive damage to the blood vessels by binding together at the site of damage.

Blood Vessels

  • Blood vessels are tubes that carry blood all over the body.
  • Arteries, veins and capillaries are collectively called blood vessels.
  • Arteries are blood vessels that carry oxygenated blood to the cells and tissues of our body.
  • They carry blood from the heart to the tissues.
  • Veins are blood vessels that carry away deoxygenated blood from the cells and tissues of our body.
  • They carry blood from tissues to the heart.

Capillaries

  • Capillaries are the smallest of the body’s blood vessels.
  • It serves the most important task of the circulatory system: the exchange of material between circulation and cells.
  • The fine network makes it easy for the process of diffusion of materials due to the increase in surface area.
  • The heart is a muscular organ in animals that pumps blood through blood vessels to all the parts of the body.
  • The heart consists of four chambers that prevent the oxygenated and deoxygenated blood from mixing.
  • The upper chambers are called atria, and the lower chambers are called as ventricles.
  • Valves are present in the heart as well as in veins.
  • In the heart, they are present between the atria and ventricles and at the base of big vessels leaving the heart.
  • Valves are responsible for the unidirectional flow of blood in the body.
  • Opening and closing of the valves present in the heart are responsible for the lub-dub sound of the heart.

Pulmonary Circuit

  • It is the network of arteries and veins connecting the heart and lungs.
  • Deoxygenated blood is pumped from the blood to the lungs for oxygenation.
  • The oxygenated blood returns to the heart to be pumped to the rest of the body.

Oxygenation of Blood

  • Oxygenation of blood occurs at the alveoli in the lungs.
  • The alveoli have blood vessels wrapped around it, and the blood is oxygenated by diffusion.
  • The heart periodically expands and contracts to pump blood into the arteries, which also expand and contract as the blood flows through them. This is called pulsation.
  • This pulsation of the arteries can be felt at certain places of the body, such as the wrist.
  • Pulsation is measured as the number of heartbeats per minute, which is nothing but the pulse rate

To know more about Human Circulatory System, visit here .

Excretory System

The process of removal of waste products from the cells of living organisms is called excretion.
  • For human beings, the waste products are in the form of carbon dioxide, urine and faeces.
  • Our body’s main excretory organs are the kidneys.
  • There is a pair of kidneys present on either side of the spine.
  • Each kidney is a bean-shaped organ, reddish in colour.
  • It contains millions of tiny tubules that act as microscopic filters and filter out the useful and harmful substances from the blood.
  • The useful substances are again reabsorbed back into the blood, and only harmful substances are concentrated.
  • These harmful substances are present in a dissolved state in water, and now it is called urine.
  • Urine is excreted out of the body.
  • Thus, kidneys act as filters of our bodies.
  • Urine is sent from the kidneys to the urinary bladder through tubes called ureters.

Urinary Bladder

  • The urinary bladder is a muscular bag where urine is accumulated and excreted from the body through the urethra.
  • It can hold about 300-500 mL of urine for a while before the urge to empty occurs.
  • Dialysis is the filtering of blood outside the human body using a machine when both the kidneys fail.

Excretion in Other Animals

  • Excretion in different animals differs based on the excretory material.
  • Ammonia, urea and uric acid are the commonly excreted material.

To know more about Human Excretory System, visit here .

Transportation in Plants

Osmosis is the movement of solvent molecules from a region of lower solute concentration to a region of higher solute concentration through a semi-permeable membrane.
  • Root hairs are elongated extensions of the roots that are comparable to hairs on animals.
  • They increase the surface area for increased exchange of water and minerals.
  • Phloem is the plant tissue that transports the soluble organic material created during photosynthesis from the leaves to the other parts of the plant.
  • Xylem is the plant tissue that transports water and other nutrients from the roots to other parts of the plant.

To know more about Transportation in Plants, visit here .

Transpiration

  • Transpiration is the loss of water in the form of water vapour from stomata present on leaves.
  • This process also helps the plants absorb and distribute water through their roots.
  • Transpiration exerts a straw-like effect, and the water moves up against gravity in tubes made of xylem cells.

To know more about Transpiration, visit here .

Frequently Asked Questions on CBSE Class 7 Science Notes Chapter 11 Transportation in Animals and Plants

What is the human circulatory system.

The circulatory system pumps blood from the heart to the lungs to get oxygen. The heart then sends oxygenated blood through arteries to the rest of the body.

What are the main components of blood?

Blood has four main components: plasma, red blood cells, white blood cells and platelets.

What are capillaries?

Capillaries are very tiny blood vessels, and they help to connect the arteries and veins, in addition to facilitating the exchange of certain elements between blood and tissues.

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Class 7 Science MCQ Chapter 11 Transportation in Animals and Plants

Class 7 Science MCQ Chapter 11 Transportation in Animals and Plants Solutions in English Medium, Class 7 Science Multiple Choice Question Answer in English to each chapter is provided in the list so that you can easily browse throughout different chapters  Class 7 Science MCQ Chapter 11 Transportation in Animals and Plants Notes and select need one.

Also, you can read the SCERT book online in these sections Class 7 Science Objective Type Solutions by Expert Teachers as per SCERT ( CBSE ) Book guidelines. These solutions are part of SCERT  All Subject Solutions . Here we have given Assam Class 7 Science MCQs Solutions in English for All Subject, You can practice these here.

Transportation in Animals and Plants

Chapter – 11

1. The component of the vascular system which transports water in plants is:

(b) Phloem.

(c) Leaves.

(d) None of the above.

Ans: (a) Xylem.

2. What is the main function of the circulatory system in most animals?

(a) To distribute food and oxygen to different cells.

(b) To produce energy.

(c) To digest food.

(d) To absorb nutrients.

Ans: (a) To distribute food and oxygen to different cells.

3. What prevents the backflow of blood inside the heart during contraction?

(a) Thick muscular walls of ventricles.

(b) Valves.

(c) Thin walls of atria.

(d) All of the above.

Ans: (b) Valves.

4. What is the composition of blood?

(a) RBC, WBC, platelets, and water.

(b) Plasma, RBC, WBC, and platelets.

(c) Plasma, RBC, nutrients, and enzymes.

(d) Plasma, oxygen, carbon dioxide, and RBC.

Ans: (b) Plasma, RBC, WBC, and platelets.

5. Which vein brings clean blood from the lungs into the heart?

(a) Renal vein.

(b) Pulmonary vein.

(c) Vena cava.

(d) Hepatic vein.

Ans: (b) Pulmonary vein.

6. What is the role of arteries in the circulatory system?

(a) To carry blood from all parts of the body to the heart.

(b) To carry blood from the heart to all parts of the body.

(c) To filter waste from the blood.

(d) To regulate body temperature.

Ans: (b) To carry blood from the heart to all parts of the body.

7. Which blood vessel does not carry any carbon dioxide?

(a) Pulmonary artery.

(b) Vena cava.

(c) Hepatic vein.

(d) Pulmonary vein.

Ans: (d) Pulmonary vein.

8. What is the heart rate of an adult human?

(a) 50-60 times per minute.

(b) 60-70 times per minute.

(c) 70-80 times per minute.

(d) 80-90 times per minute.

Ans: (c) 70-80 times per minute.

9. The phloem tissue in plants is responsible for the transport of:

(b) water and minerals.

(c) glucose.

(d) all of the above.

Ans: (c) Glucose.

10. Which of the following organs are part of the human excretory system?

(a) Lungs, liver, and pancreas.

(b) Kidneys, ureters, urinary bladder, and urethra.

(c) Heart, lungs, and brain.

(d) Stomach, intestines, and liver.

Ans: (b) Kidneys, ureters, urinary bladder, and urethra.

11. The functions of blood are:

(a) It transports nutrients, respiratory gases, waste products, hormones etc.

(b) It maintains body temperature.

(c) It provides protection to the body by forming antibodies.

Ans: (d) All of the above.

12. The fluid part of the blood is called:

(a) Plasma.

(d) Blood platelets.

Ans: (a) Plasma.

13. State two vital functions of kidneys:

(i) Removal of toxic waste such as urea and uric acid from the blood.

(ii) It regulates the water balance of the blood.

(c) Both (a) and (b).

Ans: (c) Both (a) and (b).

14. The cells in the blood which fight against the germs entering the body are:

(c) Platelets.

(d) Haemoglobin.

Ans: (b) WBC.

15. The arteries have thick elastic walls because:

(a) Rapid blood flows at high pressure.

(b) Slow blood flows at low pressure.

(c) Rapid blood flows at low pressure.

(d) Slow blood flows at high pressure.

Ans: (a) Rapid blood flows at high pressure.

16. The clot is formed because of the presence of another type of cells in the blood, called:

(a) Haemoglobin.

(b) Platelets.

(c) Arteries.

Ans: (b) Platelets.

17. Veins allow blood to flow only:

(a) Towards the heart.

(b) Away from the heart.

(c) Towards lungs.

(d) Away from the lungs.

Ans: (a) Towards the heart.

18. The blood which fights against germs that may enter our body is:

(a) White blood cells.

(b) Red blood cells.

Ans: (a) White blood cells.

19. The process of removal of waste materials from the body is called:

(a) Digestion.

(b) Excretion.

(c) Respiration.

(d) Inhalation.

Ans: (b) Excretion.

20. Blood is a liquid, which has cells of various kinds suspended in it. The fluid part of the blood is called:

(c) Plasma.

Ans: (c) Plasma.

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RD Sharma Solutions , RS Aggarwal Solutions and NCERT Solutions

Transportation in Animals and Plants Class 7 Extra Questions and Answers Science Chapter 11

September 9, 2020 by Prasanna

In this page, we are providing Transportation in Animals and Plants Class 7 Extra Questions and Answers Science Chapter 11 pdf download. NCERT Extra Questions for Class 7 Science Chapter 11 Transportation in Animals and Plants with Answers will help to score more marks in your CBSE Board Exams.

Class 7 Science Chapter 11 Extra Questions and Answers Transportation in Animals and Plants

Extra Questions for Class 7 Science Chapter 11 Transportation in Animals and Plants with Answers Solutions

Transportation in Animals and Plants Class 7 Extra Questions Very Short Answer Type

Question 1. What is blood? Answer: Blood is a fluid that is pumped through the body by the heart and contains plasma, blood cells and platelets.

Question 2. What is plasma? Answer: Plasma is a straw-coloured watery fluid of the blood and lymph that contains no cells, but in which the blood cells (erythrocytes, leukocytes and thrombocytes) are suspended.

Question 3. Define the RBC (red blood cell). Answer: Red blood cell is disc-shaped, biconcave cells with no nucleus. It contains haemoglobin to carry oxygen to different parts of the body.

Question 4. What is platelet? Answer: Platelet is an irregular, disc-shaped particle in the blood that assists in blood clotting.

Question 5. What is the function of arteries? Answer: Arteries carry oxygen-rich blood from the heart to all parts of the body.

Question 6. What is the function of veins? Answer: Veins carry carbon dioxide-rich blood from all parts of the body to the heart.

Question 7. What is capillary? Answer: Capillary is any of the thin-walled, minute blood vessel connecting arterioles with venules.

Question 8. What is heart? Answer: Heart is the hollow muscular organ located behind the sternum and between the lungs. Its rhythmic contractions and relaxation pumps blood throughout the body.

Question 9. How many types of blood vessels are there? Name them. Answer: There are three types of blood vessels:

  • capillaries

Question 10. Name the four chambers of the heart. Answer:

  • right atrium
  • left atrium
  • right ventricle
  • left ventricle

Question 11. Where is the human heart located? Answer: The heart is located in the chest cavity.

Question 12. What is excretion? Answer: The process of removal of wastes produced in the cells of the living organisms is known as excretion.

Question 13. Write the names of two vascular tissues present in the plants. Answer:

Question 14. Define transpiration. Answer: Transpiration is the process by which excess water in plants evaporates through the stomata of the leaves.

Question 15. Write the composition of urine. Answer: Urine consists of 95% water, 2.5% urea and 2.5% other wastes.

Transportation in Animals and Plants Class 7 Extra Questions Short Answer Type

Question 1. Differentiate between pulse and pulse rate. Answer:

Pulse Pulse rate
It is the throbbing of heart due to the flow of blood in the arteries. It is the number of heartbeats per minute.

Question 2. What is the use of a stethoscope? Explain its structure as well. Answer: Stethoscope is used by doctors to amplify the sound of the heart. It consists of two earpieces, a chest piece and a tube that joins these parts. With the help of this device, doctors can check out a disease by listening carefully to the heartbeat.

Question 3. What is blood? What does it consists of? Answer: Blood is the fluid circulating through the heart, arteries, veins. It carries oxygen and nutrients to the cells of the body and removes waste materials and carbon dioxide from the body. Blood consists of the liquid, i.e., plasma, red blood cells (RBCs), white blood cells (WBCs) and platelets.

Question 4. What are the functions of blood? Answer: The functions of blood are:

  • It transports oxygen to all parts of the body from the lungs.
  • It transports the digested food to all parts of the body from the small intestine.
  • It helps in removing waste products and carbon dioxide from the cells.

Question 5. What do you mean by dialysis? Answer: If the kidneys of a person fail to function due to infection or injury, blood is filtered periodically by using an artificial kidney to eliminate the wastes from the blood. This process is called dialysis.

Question 6. What kind of blood flows in the arteries and veins? Answer: Arteries carry oxygen-rich blood, whereas veins transport carbon dioxide-rich blood. Exceptionally, pulmonary artery carries carbon dioxide-rich blood (i.e., impure) and veins carry oxygen-rich blood (i.e., pure).

Question 7. Explain the removal of urine from the body. Answer: After filtration, the urine reaches the urinary bladder by passing through ureter; it gets stored in the bladder. Whenever required, it gets eliminated through an opening called urethra.

Question 8. Write the importance of heartbeat. Answer: The rhythmic contraction and relaxation constitute a heartbeat. Heartbeat helps in pumping the blood throughout the body.

Question 9. How does the absorption of water and minerals take place in the plants? Answer: With the help of roots, plants absorb water and minerals. Roots contain root hair which are fine threadlike structures made of a single cell. Water and minerals from the soil enter root hair, pass through the secondary root and reach the vascular tissue, xylem. From xylem it is transported to all parts of the plant.

Question 10. Why the heart has different chambers? Answer: Blood has to transport both oxygen and carbon dioxide. Hence the heart has different chambers to prevent mixing of oxygen-rich blood and carbon dioxide-rich blood with each other.

Question 11. What is translocation. Where does it take place? Answer: Translocation is the process of transport of soluble products of photosynthesis from leaves to other parts. It occurs in phloem.

Question 12. Explain the formation of urine. Answer: Blood contains nitrogenous wastes. These have to be removed from the body, since they are toxic and so are harmful for the body. The elimination is done by the kidneys.

Blood contains both useful and harmful substances. When it reaches the kidney, the filtration is done by its unit called nephron. The useful substances are absorbed back, whereas the harmful substances get eliminated as urine.

Question 13. Where do plants store their waste products? Answer:

  • Plants store their waste products like gums and resins in the old xylem.
  • Plants store wastes in vacuoles and leaves that fall off.

Question 14. Write one function each of blood platelets and heart. Answer:

  • Blood platelets: They help in clotting of blood.
  • Heart: It receives impure blood from veins, purifies it and then pumps the blood with sheer forces so that it could go to all parts of the body.

Transportation in Animals and Plants Class 7 Extra Questions Long Answer Type

Question 1. Write the structures and functions of blood vessels. Answer: The structures and functions of blood vessels are given as follows: Arteries: Structure: Arteries have thick elastic wall because they carry blood from the heart at a high pressure to other parts of the body. Function: They carry oxygen-rich blood from the heart to all parts of the body.

Veins: Structure: They have thin walls comparatively to arteries because the blood flows with less pressure. Rather they have valves which prevents back flow of blood. Function: They carry carbon dioxide-rich blood from all parts of the body to the heart.

Capillaries: Structure: These are very thin blood vessels, having walls one cell thick. Function: Across the thin wall of the capillaries, the exchange of gases and nutrients take place between the blood and the surrounding cells.

Question 2. Explain the working of heart. Answer:

  • Deoxygenated blood from all parts of the body enters the right chamber of the heart called right artium or auricle through superior and inferior vena cava.
  • As the atrium contracts deoxygenated blood flows from right atrium to right ventricle through tricupsid valve.
  • When ventricle is full tricupsid valve shuts to prevent backflow of blood into atrium.
  • The ventricle then contracts blood into pulmonary artery to reach the lungs where it get oxygenated.
  • Oxygenated blood then returns to the left atrium of heart through pulmonary veins.
  • As the atrium contracts, oxygenated blood flows from left atrium to left ventricle through mirtal valve.
  • And when ventricle contracts, blood leaves the heart through aortic valve to the arteries. Arteries circulate blood throughout the body.

Transportation in Animals and Plants Class 7 Extra Questions and Answers Science Chapter 11 1

Question 4. What are the various components of blood. Write function of each component. Answer: Blood has four main components, i.e., plasma, red blood cells, white blood cells and platelets. Function of various components are:

  • Plasma: Plasma is the watery component of blood. It suspends other components of blood. It contain many important dissolved substances, such as protein, electrolytes, nutrients, gases and waste products. It maintain the exact pressure of the blood.
  • Red blood cells: RBC contain haemoglobin protein, whose main function is to carry oxygen to all parts of the body and to bring carbon dioxide to the lungs.
  • White blood cells: Main function of WBC is to fight against infections diseases and foreign invaders.
  • Platelets: It helps in clotting of blood during injuries and thus, prevent excess loss of blood from our body.

Question 5. Explain the excretion in birds, fishes, lizards, dogs and humans. Answer: The way of the elimination of waste products from the body of animals depends on the availability of water. Animals like birds and lizards excrete a white coloured, semi-solid product, known as uric acid. Aquatic animals (like fish) excrete the waste materials (i.e., ammonia) in the gaseous form which directly dissolve with water. Dogs and human beings excretes urea.

Question 6. Explain human circulatory system with a well labelled diagram. Answer: Circulatory system is the life support system of our body that provides our body cells with nutrients and oxygen. It takes away waste product from the body cells. Our circulatory system comprises of the heart, blood, blood vessels and lungs.

  • Blood is the fluid that carries oxygen and nutrients to various parts of the body and takes away wastes and carbon dioxide from the cell for elimination.
  • Blood vessels comprises of arteries, veins and Capillaries. Arteries carry oxygen-rich blood from the heart to various parts of the body. Capillaries are single-walled vessels which exchange gases and nutrients from the cells.
  • Veins carry carbon dioxide-rich blood from different parts of the body to the heart.
  • Heart is a muscular organ with four chambers which pumps blood throughout the body. It pumps carbon dioxide-rich blood to the lungs for purification.
  • When it receives oxygen-rich blood from the lungs it again pump this blood to arteries for transportation to various body parts.
  • Lungs helps in exchange of gases between air we breathe in and the blood. It helps in elimination of carbon dioxide from blood and making it rich in oxygen content.

Transportation in Animals and Plants Class 7 Extra Questions and Answers Science Chapter 11 2

Transportation in Animals and Plants Class 7 Extra Questions HOTS

Question 1. Which feature of heart does not allow mixing of oxygen-rich blood with carbon dioxide-rich blood? Answer: Heart is divided into four chambers and are protected with valves which prevent their backflow. Thus, these features prevent mixing of oxygen-rich blood with carbon-dioxide rich blood.

Question 2. Why do doctor often holds our wrist when we go for a check up? Answer: Doctor holds our wrist to count our pulse rate and to check whether it is normal or not.

Question 3. Why wall of right ventricle is thinner than that of the left ventricle? Answer: This is because the left ventricle has to pump blood all the way around the body, but the right ventricle only has to pump it to the lungs.

Question 4. What will happen if oxygenated and deoxygenated blood gets mixed? Answer: Mixing of oxygenated blood with deoxygenated blood will lead to less oxygen supply to the cells. Under oxygen deficient condition, cells will not perform normally which may adversely affect the organism as a whole.

Question 5. Does artery always carries oxygen-rich blood? Answer: No. Pulmonary artery carries carbon dioxide-rich blood from heart to the lungs.

Question 6. Sponges and Hydra do not posses any circulatory system. How nutrients and oxygen is transported inside their body? Answer: The water in which sponges and Hydra live brings food and oxygen as it enters their bodies. The water also carries away waste material and carbon dioxide as it moves out. Thus, these animals do not need a circulatory system.

Question 7. Water from soil moves inside the root cell but never comes out from root cell to soil. Why? Answer: Water always move from a region of its higher concentration to a region of its lower concentration. This process is called osmosis. Concentration of water is more in the soil compared to its concentration inside the root cell, so it move from soil to the root cell and not from root cell to the soil.

Transportation in Animals and Plants Class 7 Extra Questions Value Based (VBQs)

Question 1. While learning to ride a bicycle Satish lost his balance and fell down. He got a cut on his knee and it started bleeding. His sister Sujata on seeing this asked him to put pressure on the area with a clean handkerchief. She immediately rushed to her home to call her parents. (a) How does applying pressure to a bleeding wound help? (b) When we get small bruises, bleeding stops automatically after some time. Why? (c) What would be the colour of wounded area? Why? (d) Which type of blood cells are responsible for clotting of blood? (e) What value of Sujata is shown here?

Answer: (a) By applying pressure to a bleeding wound, we constrict the blood vessels manually and prevents too much loss of blood from the wound. (b) Bleeding stops automatically in small bruises after some time due to clotting of blood. (c) Colour of wounded area will be dark red due to formation of clot. (d) Blood platelets. (e) Sujata is intelligent, swift in her action, helpful, etc.

Question 2. Natasha does not drink enough water according to her age. When her teacher came to knew about this, she called her. She explained her that if she won’t drink sufficient water then she may face many health issues including uremia. She understood the importance of water and started drinking 8-10 glasses of water everyday. (a) What is uremia? (b) What are the other health issues related with drinking less water? (c) What is the role of water in elimination of waste? (d) What values of Natasha is shown here?

Answer: (a) Uremia is a disease which is caused due to raised level of urea in the blood. (b) Dehydration, stomachache, dry skin, headache, restlessness, etc. (c) Water helps in elimination of nitrogenous waste and other salts through excretion and sweating. (d) Natasha is obedient, sincere and mature enough to understand her teacher.

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COMMENTS

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    Q.3.Choose the correct options: (a) In plants, water is transported through. (i) Xylem (ii) Phloem (iii) Stomata (iv) Root hair. (b) Water absorption through roots can be increased by keeping the plants. (i) In the shade (ii) in dim light (iii) under the fan (iv) covered with a polythene bag. Ans .

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    19: Name the term for transport of food from leaves to other parts of plants. Answer: Translocation. 20: Name the type of blood vessels which carry blood from organs to the heart. Answer: Veins. 21: Name the waste products formed in body. Answer: Urea, uric acid and excess water. 22: Define excretion.

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    Short answers - Ncert solutions for class 7 science Transportation in Animals and Plants. 3. Choose the correct option: (a) In plants, water is transported through. (i) xylem. (ii) phloem. (iii) stomata. (iv) root hair. (b) Water absorption through roots can be increased by keeping the plants.

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    Revision Notes of Ch 11 Transportation in Animals and Plants Class 7th Science. → All multicellular organisms have a specialized system to transport nutrients and other necessary materials to the cell and the wastes away from the cell. This system is known as circulatory system. → Circulatory system is the transportation system of human body.

  18. Transportation in Animals and Plants Class 7 Extra Questions Science

    Answer: The circulatory system consists of three major organs, i.e., blood, blood vessels and heart. Question 3. Give the name of blood component which is liquid and contains 90% water. Answer: The sticky liquid part of the blood, containing 90% water is called plasma. Question 4. Name the organ which is located in the chest cavity with its ...

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  21. 7th Class Science Transportation in Animals and Plants Question Bank

    DIRECTIONS: Read the Passage (s) given below and answer the questions that follow. Passage - 2 Plants have pipe-like vessels made up of special cells, forming the vascular tissues, for transport of water and nutrients from the soil. These vascular tissues are called xylem. The transportation of food is done by vascular tissues called phloem.

  22. Transportation in Animals and Plants Class 7 Science Notes

    Circulatory System. The organ system of the body that is responsible for the transport of material throughout the body is called the circulatory system. The materials transported are nutrients, oxygen, carbon dioxide, cells, etc. The medium of transportation is blood. The primary parts of the circulatory system are the heart, arteries and veins.

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  24. Transportation in Animals and Plants Class 7 Extra Questions and

    Answer: Xylem. Phloem. Question 14. Define transpiration. Answer: Transpiration is the process by which excess water in plants evaporates through the stomata of the leaves. Question 15. Write the composition of urine. Answer: Urine consists of 95% water, 2.5% urea and 2.5% other wastes.