Question

wat is thigmotropism?what happens if it is not there​

Answer 1

Plants shows growth towards the touch (support) is called thigmotropism
If it were not there weak plants can't grow
Eg:tendrils plants

Answer 2

Thigmotropism is the directional response of a plant organ to touch or physical contact with a solid object. This directional response is generally caused by the induction of some pattern of differential growth. This phenomenon is clearly illustrated by the climbing tendrils of some plants, such as the sweet pea. The tendrils actually "feel" the solid object, which results in the coiling response.

If it is absent the growth of plants such as pea plant doen not take in a normel way