If the growing coleoptile tip is cut,what hap | vedclass

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Question

(A) Phototropism is the growth movement of a plant part in response to a light stimulus,primarily mediated by the hormone auxin produced in the coleop

Vedclass · Accepted Answer

Phototropism stops

Vedclass · Answer

(A) Phototropism is the growth movement of a plant part in response to a light stimulus,primarily mediated by the hormone auxin produced in the coleoptile tip.When the growing coleoptile tip is removed,the source of auxin is eliminated.Since auxin is essential for the differential growth required for phototropic bending,the removal of the tip results in the cessation of phototropism.Therefore,the correct answer is $A$.

If the growing coleoptile tip is cut,what happens to phototropism?

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