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Growth Independent Movements

One of the fo...

Question

One of the following is not caused by the growth-related movement of the concerned plant part. This is:

(a) phototropism

(b) photonasty

(c) thigmonasty

(d) thigmotropism

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Solution

(c) thigmonasty

The rolling up of plant leaves on touching is a thigmonastic movement and it is not related to growth.

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