Biology

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

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What is a main reason that many species are becoming endangered?
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What is the leaf of a fern called?
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What grows from an acorn?
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Which of these organs can grow back if some of it is removed?
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What are the young leaves of a plant embryo called?
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Which of these is a kingdom in the classification of living things?
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What famous Italian artist studied human body-part relationships?
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Coffee and manioc are best grown in which climatic zone?
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