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Biology, 18.04.2020 03:49 2020seogang
When plants are stressed by dry conditions, they secrete the hormone abscisic acid (ABA) and in response the stomata close, even in the light. ABA is known to trigger the release of calcium ions that serve as second messengers in the guard cells and cause massive opening of potassium (K ) channels. Which of the following would be part of the mechanism by which ABA triggers stomata to close?
A. K+ ions flow out of guard cells and water moves into guard cells in response
B. K+ ions flow into guard cells and water moves into guard cells in response
C. K+ ions flow out of guard cells and water moves out of guard cells in response
D. K+ ions flow into guard cells and water moves out of guard cells in response
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When plants are stressed by dry conditions, they secrete the hormone abscisic acid (ABA) and in resp...
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