Question

Distinguish between tropic movements and nastic movements in plants. Give examples to illustrate your answer.

Answer 1

Tropic movement	Nastic movement
1. The growth of the plant part in response to an external stimulus, where the direction of growth is determined by the direction of the stimulus, is defined as tropic movement. 2. Induced by stimuli such as light, gravity, water, chemical, and touch. ​	1. The movement of the plant part in response to an external stimulus in which the direction of movement is not determined by the direction of stimulus is defined as the nastic movement. Induced by stimuli such as heat, light, touch (or contact), etc​