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Which molecule plays the largest role in plant phototropism?

2 Answers

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Answer: Auxins.

Explanation: Auxins cause differential cell growth based on the presence or absence of light. This means that auxins play a major role in phototropism, the growth of a plant toward the light.

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User George Marques
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4 votes
i think it is gravitropism
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User Kishen Nagaraju
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