NEET 2010 Biology question

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

(1)Thigmonasty
(2)ThigmotropismCorrect
(3)Thermotaxis
(4)Thigmotaxis

Answer: (2)

Solution

Thigmotropism is the directional growth movement of a plant organ in response to contact with a solid object, as in the coiling of tendrils of pea around a support; the side in contact grows slower than the free side, so it coils. So

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Question ID VK-090632