Question

___ is the directional movement of a plant part in response to contact.

Answer 1

Thigmotropsim:

1. The directional movement in response to touch or contact is called thigmotropism.
2. The coiling action of plant tendrils around the object it comes in contact with (support) is an example of thigmotropism. Another example is the Mimosa pudica or touch-me-not plant that closes its leaflets when touched.

Final Answer: Thigmotropism is the directional movement of a plant part in response to contact.