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Biology, 27.03.2020 22:29 kyliewassup
It hasn’t rained in several days and you have forgotten to water your fern. The roots sense a lack of water and produce the hormone abscisic acid. Abscisic acid triggers the guard cells to shrink. When the guard cells shrink, the stomatal pore closes and water loss decreases which inhibits the reproductive ability of the flower.
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