Transportation in Animals and Plants Class 7 Science Part 2 Chapter 3 Questions with Answers.

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Free Solutions for The Assam State School Education Board (ASSEB) Class 7 Science Part II Chapter 3 Question Answer in English Medium

Transportation in Animals and Plants - Questions and Answers

Class 7 Science Part 2 Chapter 3
Assam State Education Board Syllabus 2025-2026 Covered

This chapter explains how substances like water, nutrients, and gases are transported in animals and plants. Below are the important questions and answers from NCERT & SCERT Assam Class 7 Science Chapter 3 - Transportation in Animals and Plants, based on the Assam State Education Board syllabus for 2025-2026.

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Introduction to Transportation in Animals and Plants

Transportation is the movement of substances like nutrients, gases, and water within an organism.
Animals have a circulatory system for transport.
Plants transport water and nutrients through vascular tissues.

Class 7 Science Question Answer – Part 2

Below are the chapters of Class 7 Science Part 2. Click on the chapter name to access the respective question-and-answer content:

Transportation in Animals and Plants

1. Match the following structures in Column I with their respective functions in Column II.

Column I	Column II
(i) Stomata	(a) Absorption of water
(ii) Xylem	(b) Transpiration
(iii) Root hairs	(c) Transport of food
(iv) Phloem	(d) Transport of water
	(e) Synthesis of carbohydrates

Answers:

Column I	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 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 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 trees due to the suction pull caused by transpiration.

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:

(i) In the shade (ii) In dim light (iii) Under the fan ✅ (iv) Covered with a polythene bag

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

Ans:- Transport of materials is essential for both plants and animals, as every cell requires a continuous supply of nutrients and oxygen for respiration. The food consumed is broken down into simpler forms for absorption by cells, and oxygen must be delivered to all body cells. Waste products such as carbon dioxide must also be removed. In plants, vascular tissues (xylem and phloem) facilitate water and food transport.

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

Ans:- If platelets were absent in the blood, it would not clot, as platelets release clotting factors at injury sites to prevent excessive bleeding.

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

Ans:- Stomata are tiny pores on leaf surfaces responsible for:

(i)Gas exchange.

(ii) Water evaporation (transpiration).

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

Ans:- (i) Regulates plant temperature and prevents overheating.

(ii) Creates transpiration pull, aiding water movement.

(iii) Helps remove excess absorbed water.

8. What are the components of blood?

Ans:- Blood consists of:

(i)Red Blood Cells (RBCs)

(ii) White Blood Cells (WBCs)

(iii) Platelets

(iv) Plasma

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

Ans:- Blood is needed for: (i) Transporting oxygen throughout the body.

(ii) Expelling carbon dioxide.

(iii) Regulating body temperature.

(iv) Fighting infections and diseases.

10. What makes the blood look red?

Ans:- Blood appears red due to the presence of haemoglobin in red blood cells.

11. Describe the function of the heart.

Ans:- The heart continuously pumps blood, distributing oxygen and nutrients while removing waste. It has four chambers: two atria (upper chambers) and two ventricles (lower chambers). The partition between chambers prevents oxygen-rich blood from mixing with carbon dioxide-rich blood. Blood circulates between the heart and lungs before being pumped to the rest of the body.

12. Why is it necessary to excrete waste products?

Ans:- Cellular activities generate toxic waste, which must be eliminated to maintain health and proper body function.

13. draw a diagram of the human excretory system and lebel the various parts.

Class 7 Science Chapter 3 - Important Questions & Answers

Q1: What is transportation in organisms?

Answer: Transportation is the process by which water, nutrients, and gases are moved to different parts of an organism.

Q2: What is the function of the circulatory system in animals?

Answer: The circulatory system transports oxygen, nutrients, and waste products throughout the body.

Q3: What are the main components of the human circulatory system?

Answer: The main components are:

Heart (pumps blood)
Blood vessels (carry blood)
Blood (transports oxygen, nutrients, and waste)

Q4: What are the types of blood vessels?

Answer:

Arteries – Carry oxygenated blood away from the heart.
Veins – Carry deoxygenated blood to the heart.
Capillaries – Tiny vessels that connect arteries and veins.

Q5: What is the function of the heart?

Answer: The heart pumps blood throughout the body, ensuring the transport of oxygen and nutrients to cells and the removal of waste products.

Q6: What is blood made of?

Answer: Blood consists of:

Red Blood Cells (RBCs) – Carry oxygen.
White Blood Cells (WBCs) – Fight infections.
Platelets – Help in blood clotting.
Plasma – Liquid part that carries nutrients and hormones.

Q7: What is excretion?

Answer: Excretion is the process of removing waste products from the body.

Q8: How do plants transport water?

Answer: Plants transport water through xylem tissue, which carries water from roots to leaves.

Q9: How do plants transport food?

Answer: Plants transport food through phloem tissue, which carries nutrients from leaves to other parts.

Q10: What is transpiration?

Answer: Transpiration is the loss of water from plant leaves through stomata.

Q11: Why is transpiration important?

Answer: It helps in cooling the plant, maintaining water balance, and drawing water upward from roots.

Q12: What is the role of the kidneys in excretion?

Answer: Kidneys filter waste from the blood and form urine.

Q13: What is the difference between xylem and phloem?

Xylem	Phloem
Transports water	Transports food
Moves upwards	Moves in all directions
Provides structural support	Does not provide support

Q14: How does blood circulation work?

Answer: The heart pumps oxygenated blood through arteries, which is delivered to body cells. Deoxygenated blood is carried back to the heart through veins and then sent to the lungs for oxygenation.

Q15: What is a heartbeat?

Answer: A heartbeat is the rhythmic contraction and relaxation of the heart muscles.

FAQs on Transportation in Animals and Plants

Q1: Why do we feel our heartbeat?

Answer: We feel our heartbeat due to the contraction and relaxation of heart muscles pumping blood.

Q2: Why do doctors check pulse rate?

Answer: The pulse rate indicates heart function and overall health.

Q3: What is the function of veins?

Answer: Veins carry deoxygenated blood back to the heart.

Q4: What is the function of stomata in plants?

Answer: Stomata help in gas exchange and transpiration.

Q5: How do roots absorb water?

Answer: Roots absorb water through tiny root hairs by osmosis.

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