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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

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The answer is C hopefully it will help you get a good grade
User Manoj H L
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C. lack of available sunlight during the night
User Smdsgn
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