NCERT Solutions Class 7th Science Chapter – 7 Transportation in Animals and Plants Question & Answer

May 11, 2022

NCERT Solutions Class 7th Science Chapter – 7 Transportation in Animals and Plants

Textbook	NCERT
Class	7^th
Subject	Science
Chapter	11^th
Chapter Name	Transportation in Animals and Plants
Category	Class 7th Science
Medium	English
Source	Last Doubt

NCERT Solutions Class 7th Science Chapter – 7 Transportation in Animals and Plants Question & Answer Why is transport important? What is xylem number?, What is xylem transport?, What transports water in plants?, What transports food in plants?, What phloem transports food?, Does phloem transport sugar?, What is phloem and xylem?, Which plant organ absorbs water?, What was the old mode of transport?, What are means of water transport?, Which is the fastest means of transport?

NCERT Solutions Class 7th Science Chapter – 7 Transportation in Animals and Plants

Chapter – 7

Transportation in Animals and Plants

Question & Answer

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

Answer:

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

Q. 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 .

Answer: (i) arteries (ii) red blood cells (in) capillaries (iv) heartbeat (v) urea (vi) salts (vii) urine (viii) transpiration.

Q. 3. Choose the correct options:
(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

Q. 4. Why is transport of materials necessary in a plant or an animal? Explain.
Answer: Transport of materials is necessary for plants or animals because due to it the nutrients and oxygen are made available to all the parts of the body. If the transport of necessary nutrients and oxygen does not take place in the body, the body will not be able to survive.

Q. 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.

Q. 6. What are stomata? Give two junctions of stomata.
Answer: There are small openings on the lower surface of the leaves. These pores are called stomata. These openings are surrounded with guard cells.
Functions of stomata:
1. It helps in the transpiration of water, i.e., the loss of excess water from the plant.
2. Loss of water from the stomata creates an upward pull, i.e., suction pull which helps in absorption of water from the roots.
3. They help in exchange of gases.

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

Q. 8. What are the components of blood?
Answer: Red blood cells, white blood cells, platelets and plasma.

Q. 9. Why is blood needed by all the parts of a body?
Answer: Blood is needed by all the parts because it contains the digested food and oxygen in it. It supplies the oxygen and digested food to various parts of the body to provide essential energy to them which helps the body to perform various functions.

Q. 10. What makes the blood look red?
Answer: The presence of a red pigment called haemoglobin in red blood cells (RBC) makes the blood appear red.

Q. 12. Why is it necessary to excrete waste products?
Answer: Certain waste and toxic products are formed during functioning of body cells. The waste products like urea etc. are toxic. When these toxic materials are not removed from the body, they get mixed with blood and can damage the cells of body. It is necessary to remove such poisonous waste materials from our body.