Answer: When the plant has enough water in its cells the guard cells swell up and open the stomata. When the plant isn't getting enough water the guard cells can't swell and the stomata stay closed, so the plant doen's lose water. But if the stomata are closed photosynthesis can't happen and eventually the plant might starve.
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The distribution of organisms on the earth's surface is ultimately due to evolutionary change: Organisms or Species do not stay the same over time but are in a constant state of change as individuals. They are best able to live and reproduce within certain environments.
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Answer: q#1 The phosphate tail of ATP is the actual power source which the cell taps.
q#2 atp
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so what's the question asking? does she want to know how much? or the necessary items?
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A population is the smallest unit of living organisms that can undergo evolution within a given species.
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