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Question

Assertion: Opening and closing of stomata is controlled by guard cells.
Reason: Shrinking of guard cells results in the opening of stomatal pore.

A
Only assertion is wrong.
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B
Only reason is wrong.
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C
Both assertion and reason are wrong.
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D
Both assertion and reason are true.
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Solution

The correct option is B Only reason is wrong.
The stomatal opening or the stoma is a pore that is surrounded by the guard cells. The opening and closing of the pore is a function of the guard cells. The guard cells swell when water flows into them, causing the stomatal pore to open. Similarly the pore closes if the guard cells shrink.

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