Biology

What's the term for the dependence of a plant on the proper day-length to flower?

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What caused the Irish potato famine of the 1840's?
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Which is the sheet-like muscle at the bottom of a human chest?
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Which of these animals competes with a lion for food?
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Where are the carpals found in humans?
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What method do ferns use to reproduce?
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Which theory states that living things come only from other living things?
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Which form of communication does a bird use?
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What is most of the oxygen that enters the human body taken in through?
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