A2 Biology - abscisic acid water stress

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A Level Biology, A2 level. Topic Homeostasis - An explanation of how stomata close rapidly during water stress, as a result of the release of abscisic acid.
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I wish I found your channel earlier, such great explanations for A2 concepts !

batoolwzaidi
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wow i solved 90% problems i had thanks alott but i have a question why cant hydrogen bind to guard cell instead of pottasium to increase solute potential for osmosis to take place? also thanks in advance +1 like.

mahinuddinlord