Movement of plant in response to only touch (stimulus) is called as-

Seismonasty

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Mutation

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Thigmonasty

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Nyctinasty

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Solution

The correct option is C Thigmonasty
In Greek, the prefix “thigmo-” refers to the touch stimuli and the suffix “-nasty” denotes the nastic movement; thus, the term “thigmonasty” indicates the coiling or curling up movement of plant structures when they are touched. Certain noteworthy examples are the venus flytrap and the Mimosa pudica (colloquially known as the shameplant).

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