Question

What are guard cell????

Answer 1

each of a pair of curved cells that surround a stoma, becoming larger or smaller according to the pressure within the cells.

Answer 2

Guard cells are important for functioning of stomata .

Each stoma is guarded by a pair of bean shaped guard cells which govern the opening and closing of stomatal aperture.
That's why they are important.


Stomata :
Cells form a continuous layer , but in leavers epidermis has small openings called stomata.

Stomata in the epidermis of leaves help in gaseous exchange during respiration and photosynthesis.


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