Question

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

 How do tropisms differ from nasties (or nastic movements)?

Answer 1

Tropic movements	Nastic movements
These are directional movements of plants in response to stimulus.	These are non-directional movements of plants in response to stimulus.
Example: The upward growth of a plant stem in response to sunlight.	Example: The folding up of leaves in response to touch.

 

Answer 2

Tropism	Nasties
Tropisms are the directional movement of plant parts in response to an external stimulus.	Nasties are the non-directional movements of plant parts in response to an external stimulus.