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Question
When guard cells are flaccid, the stoma must be ______.
Options
Open
Neither open nor closed
Closed
None of these
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Solution
When guard cells are flaccid, the stoma must be closed.
Explanation:
A flaccid guard cell closes the stomata by relaxing its inner membrane. Likewise, the inner wall pulls outward to open the stomata when the guard cells become turgid.
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