CBSE Class 10 Science 2019 · Paper 31/2/1 · Question 11(a)
What is transpiration ? List its two functions.
Answer
Transpiration is loss of water vapour from aerial parts, mainly through stomata; it pulls water and minerals upwards and cools the plant.
Transpiration is the loss of water in the form of vapour from the aerial parts of a plant, mainly through the stomata of the leaves.
Two functions:
(i) It creates a suction (transpiration pull) that helps in the absorption and upward movement of water, and of the minerals dissolved in it, from the roots to the leaves.
(ii) It helps in temperature regulation: the evaporation of water from the leaves cools the plant.
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