from the underside of the leaf where there are many stomata
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how do plants control their water intake?
by opening and closing their stomata
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when does this happen?
when water levels change around each guard cell
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transpiration rates vary in response to facts such as...
...temperature and humidity.
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cohesion theory:
water molecules stick together in the xylem vessel. as some molecules leave during transpiration, others get pulled p behind them. this forces water to travel continuously to the leaves
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why is there less vegetation at the top of a mountain?
there is less air pressure. less carbon dioxide for trees to photosynthesize. without photosynthesis, the trees will not grow
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how is photosynthesis carried out
with the presence of enzymes. at the top of a mountain, the temperature is very cold, so the enzymes are not working at their optimum temperature.
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