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Which of the following process helps the trichomes in preventing water loss?

A. Where companion cells helps in maintaining the pressure gradient in the sieve tubes.

B. Where plants absorb water through the roots and then give off water vapor through pores in their leaves.

C. Where activity of cork cambium builds pressure on the remaining layers peripheral to phellogen and ultimately these layers dies and slough off.

D. None of the above

Correct Answer :

B. Where plants absorb water through the roots and then give off water vapor through pores in their leaves.


Trichomes is a small hair or other outgrowth from the epidermis of a plant stem, typically unicellular and glandular. Trichomes that often cover the plant body are the result of divisions of epidermal cells. They may be branched or unbranched and soft or stiff. The trichomes help in preventing water loss due to transpiration. Transpiration is a process where plants absorb water through the roots and then give off water vapor through pores in their leaves.

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