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Growth of both stem and root is mediated...

Growth of both stem and root is mediated by auxin. However, stem grows into air while root grows into soil. The reason is

A

Differential reaction of root and stem to auxin

B

Only the stem tip produces auxin

C

Only the root tip produces cytokinin

D

Only the root cap can perceive gravity.

Text Solution

Verified by Experts

The correct Answer is:
A
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