Which statements describe thigmotropism? Check all that apply. Thigmotropism is a plant's response to touch.

Thigmotropism is a plant's response to an external stimulus.

Thigmotropism occurs only slowly.

Thigmotropism can occur quickly or slowly.

Thigmotropism may involve the way in which a plant grows.

Thigmotropism may involve the closing and opening of plant leaves.