Multiple Choice
Stomata open when
A) potassium ions exit the guard cells and water enters by osmosis.
B) potassium ions accumulate in the guard cells and water enters by osmosis.
C) protons are actively transported into the guard cells.
D) carbon dioxide concentrations build up in the leaves.
E) Two of the above statements are correct.
Correct Answer:

Verified
Correct Answer:
Verified
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