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Thigmotropism

When the leav...

Question

When the leaves of a Mimosa pudica plant are touched with a finger, they fold up quickly. This is an example of :
(a) chemotropism
(b) thigmonasty
(c) photonasty
(d) thigmotropism

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Solution

(b) thigmonasty

The leaves of a Mimosa pudica plant show response to touch. This response is non-directional and is categorised as a thigmonastic movement.

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