Defferent b/w topism and nastic movement

1.	Defferent b/w topism and nastic movement
Answer» Tropic movements are the directional movement of parts of plants where as nastic movements are the non- directional movement of plant parts. Both tropic and nastic movements are influenced by environmental cues.Tropic movements are found\xa0virtually in all plants but\xa0nastic movements are mostly found in specialized plants and organs.In tropic movements, there is directional growth of a plant, or part of a plant, in response to an external stimulus such as gravity or light. So the direction of the stimulus controls the orientation of growth.\xa0The direction of a nastic movement is independent of where the signal comes from. It is only the quality, and not the direction, of the stimulus that triggers a response.In tropism,\xa0the effect is more or less permanent. Most nastic movements are temporary and reversible.Nastic movements are more specialized in function and distribution than tropic movements.

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