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Nookie1986 [14]
3 years ago
10

What is the external stimulus in thigmotropism?

Biology
1 answer:
irina [24]3 years ago
6 0

Answer:

Thigmotropism is defined as a negative or positive directional response in a plant or part of a plant such as a plant organ, that is caused by an external stimulus such as touch or contact with any solid object. The factor that causes the stimulus is a hard surface that can change the direction of growth of the plant or part of the plant.  Hope this helps :)

Explanation:

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