Multiple choice

Opening and closing of stomata is due to

  1. Ca2+

  2. Na+

  3. K+

  4. Cl-

  5. -
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

As K+ levels increase in the guard cells, the water potential of the guard cells drops, and water enters the guard cells. The loss of water by the guard cells causes them to become flaccid and the stomatal opening to close.

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