Question

How do guard cells help in opening and closing of stomata?

Answer 1

Answer:

there are very simple process of guard cell

Answer 2

Answer:

See, Guard cells are the functional unit of stomata.

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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