Assertion : Stomata are "turgor operated volves"
Reason: Stomata shown reversible turgor changes.

Options

A. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
C. If the assertion is true but the reason is false
D. If both the assertion and reason are false

Answer

A

Explanation

The opening and closing of stomata operate as a result of turgor changes in the guard cells when the guard cells become turgid their thin walls get extended and thick walls become slightly concave so that the stomatal aperture open. On the other hand, the guard cells become flaccid when they lose water. Their thick walls revert back to an original position resulting in the closure of stomatal pore