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Question

The leaves of Mimosa pudica drop down, when touched due to

A
Photonasty
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B
Seismonasty
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C
Nyctinasty
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D
Epinasty
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Solution

The correct option is A Seismonasty
Photonasty is the movement of plant parts in response to the light. Seismonasty is the movement of plant parts in response to the touch. The leaves of Mimosa pudica drop down when touched due to seismonasty. Nyctinasty is the movement of plant parts in the dark or at night. Epinasty is the downward movement of plant parts due to increased growth on the upper surface of plant.
Thus, the correct answer is option B.

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