Q1 of 36 Page 261

The stimulus in the process of thigmotropism is:

In Thigmotropism, the word ‘thigmo’ means touch, hence the movement of plant part in response to touch is thigmotropism.

This is a picture showing the process of thigmotropism. Here, the stimulus is touch.


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A phototropism


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C. gravitropism


D. chemotropism

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