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Stomatal movement is not affected by :

(1) O2 concentration

(2) Light

(3) Temperature

(4) CO​​​​​2​​​ concentration

1 Answer

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Ans : (1) Oconcentration

Explanation :

Stomatal movement is not affected by O2 concentration.

An increase in the temperature causes stomata to open due to its effect on the permeability of the guard cells.

An in increase in the intensity of light makes the guard cells go turgid, thus influencing the stomatal movement.

A decrease in CO2 concentration results in a biochemical process by which the stomatal cells open.

Thus, only O2 concentration does not affect the stomatal movement.

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