Question

Differentiate between:

Thigmotropism and geotropism

Answer 1

	Thigmotropism		Geotropism
1.	Directional growth movement of a plant part in response to the touch of an object.	1.	Directional growth movement of a plant part in response to gravity
2.	Stimulus: Touch	2.	Stimulus: Gravity
3.	The tendrils show positive thigmotropism.	3.	The roots of the plant show positive geotropism.
4.	The roots of the plant do not show Thigmbtropism.	4.	The stems show negative Geotropism.
5.	Example: Coiling of tendrils around support.	5.	Example: Growth of the roots of plants in a downward direction