Question

What are nastic movements???

Answer 1

Nastic movements are non-directional responses to stimuli (e.g. temperature, humidity, light irradiance), and are usually associated with plants. The movement can be due to changes in turgor or changes in growth. Nastic movements differ from tropic movements in that the direction of tropic responses depends on the direction of the stimulus, whereas the direction of nastic movements is independent of the stimulus's position.

Answer 2

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The movement of a plant part in response to an external stimulus in which the direction of a response is not determined by the direction of stimulus is called nastic movement.