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Coiling of garden pea tendrils around any support is an example of:

1. thigmotaxis
2. thigmonasty
3. thigmotropism
4. thermotaxis

Correct answer: thigmotropism

Solution

Coiling of pea tendrils happens because the plant grows toward the side that contacts the support, producing a directional response to touch. That makes it a tropic movement, specifically thigmotropism.

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