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
Correct Answer:
(a) In plants, water is transported through (i) xylem
(b) Water absorption through roots can be increased by keeping the plants (iii) under the fan.
Explanation:
Xylem tissues like xylem vessels and tracheids transport water and minerals in the plants. Xylem transports water and minerals from the roots to the upper parts of the plant.
Water absorption through roots can be increased by keeping the plants under the fan. Because under the fan, the movement of air increases, which results in an increasing rate of transpiration. Thus, water and minerals absorption also increases. Water and dissolved minerals are absorbed by the root hair of a plant by a process called diffusion, through conducting tissue known as xylem.
During the daytime, water and minerals travel faster through the xylem as compared to the night because in the daytime and in presence of sunlight, the transpiration process takes place more effectively. It generates transpiration pull thereby water pressure which absorbs water and minerals from the roots at a higher speed compared to the night.
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