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Stomata open and close in response to-

A. water being pumped in and out of guard cells.
B. crystal formation in the plant due to excess glucose.
C. lack of available sunlight during the night.
D. stimulation by auxins producing rapid growth

2 Answers

2 votes
A) water being pumped in and out of guard cells
User TLW
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A. Water being pumped in and out of guard cells.
User ScottMcG
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