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The folding of touch-me-not leaves on touching is which type of movement?

Answer and explanation

Correct answer: Non-directional movement caused by touch

Touch-me-not leaves fold rapidly after contact because water movement changes the turgor pressure in special motor cells at the leaf base. The response does not depend on the direction from which the touch comes and is not a growth movement, so it is a non-directional touch-induced movement, commonly called thigmonasty or seismonasty. Thus option A is correct; the other choices are directional tropisms.

Related tags

Control CoordinationThigmonastyTouch Me NotControl And CoordinationWorld Of LivingScienceClass 10 Mcq

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