When we touch the leaves of a touch-me-not plant, they bend down. This is an example of

Thigmotropism

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Thigmonasty

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Phototropism

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Geotropism

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Solution

The correct option is C Thigmonasty
The leaves of touch-me-not plant show thigmonasty. Its leaves respond to vibrations when they are touched or shaken. The speed of the response depends on the magnitude of the stimulus. Flicking the leaf hard will cause the leaf to close faster whereas a gentle touch at the tip of a leaf will lead to a slower response. Thus the correct answer is option B.

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Similar questions

The rapid drooping of the leaves of the touch-me-not plant when we touch it is an example of ___.

When we touch the leaves of a touch-me-not plant, they begin to fold up and droop. What kind of movement is observed here?

I ) When we touch the leaves of a touch-me-not plant, they begin to fold up and droop.

II) When a seed germinates, the root goes down, the stem comes up into the air.

What is the nature of movements in each of these cases?

Q. The leaves of ............... plant, also known as touch-me-not plant curl up when touched.

When we touch the leaves of a touch-me-not plant, they begin to fold up and droop. When a seed germinates, the root goes down, the stem comes up into the air. What kind of movement is depicted in the first case and the second case respectively?

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