Question

how do the guard cells control opening and closing of stomata in a plant​

Answer 1

Heya!!

Guard cells swell when water enters it and shrinks as soon as it is lost.

Thanks!

Answer 2

Answer:

The opening and closing of the stomata is controlled by the guard cells.      

In light, guard cells take up water by osmosis and become turgid because their inner walls are rigid they are pulled apart, opening the pore.                  

In darkness water is lost and the inner walls move together closing the pore.

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