Question

Differentiate between tropic and nastic movements.

Answer 1

Tropic movements are found virtually in all plants but nastic 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. The 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, the 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.

Answer 2

tropic movement is a type of movement which August was the stimulus and Nastic Movement is a type of movement which occurs away from the stimulus.
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