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Match structures given in Column I with functions given in Column II.
| A. Stomata | (i) Absorption of water |
| B. Xylem | (ii) Transpiration |
| C. Root hairs | (iii) Transport of food |
| D. Phloem | (iv) Transport of water |
A. Stomata | (i) Transpiration |
B. Xylem | (ii) Transport of water |
C. Root hairs | (iii) Absorption of water |
D. Phloem | (iv) Transport of food |
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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 ______.
arteries
,red blood
,capillaries
,heart beat
,urea
,salts
,urine
,transpiration
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
(a) (i) xylem
(b) (iii) under the fan
Why is transport of materials necessary in a plant or in an animal? Explain.
Transport of materials is necessary in both plants and animals as every cell needs a regular supply of nutrients and oxygen for releasing energy through respiration. The food that we eat is broken down into smaller components to be absorbed by the cells. The oxygen that we inhale is also transported to all the cells of the body. Our body also requires a constant removal of waste materials such as carbon dioxide. For the transport of all these materials (food, oxygen, and wastes), our body has a specialised transport system. Similarly, in plants, the transport of water and food is accomplished with the help of a complex transport system.
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