Distinguish between tropic movements and nastic movements in plants. Give examples to illustrate your answer.
How do tropisms differ from nasties (or nastic movements)?
|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.|
|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.|
Concept: Tropic Movements in Plants
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