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Stomata in grass leaves are closed during the night. Select the most appropriate reason from the following:

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Flaccidity of subsidiary cells

Turgidity of guard cells

Flaccidity of bulliform cells

Flaccidity of guard cells

answer is D.

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Detailed Solution

In grass leaves, the flaccidity of dumbbell-shaped guard cells causes stomatal closure.

Turgidity of guard cells causes the opening of stomata.

Flaccidity of bulliform cells causes inrolling of grass leaves.

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