Question

difference between tropism and nastism​

Answer 1

Answer:

hey there ,

• tropism is found virtually in all plants but nastic movements are mostly found in speacalised organs and plants .
• both tropic and nastic movement are influenced by environment.
• in tropism there is directional movement of plant in response to the surrounding like gravity or light but the direction of nastic movement is independent .
• in tropism stimulus controls the orientation of the growth , in nastic movements stimulus triggers response .
• in tropism the effect is more or less permanent but in nastic movements the effect is temporary and reversible .

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Answer 2

Answer:

tropism

Tropic movements: The paratonic (induced) movement of growth is called tropic movements. Here the stimuli are external and unidirectional. ... Nastic movements: The paratonic movements of variations are called nastic movements. Here the stimuli are external and diffused (not unidirectional).

nastism

Nastic movements are non-directional responses to stimuli. The movement can be due to changes in turgor or changes in growth. The direction of nastic movements is independent of the stimulus' position. Kindly post each query separately.

Explanation:

Definition of 'nastic'

designating, of, or exhibiting movement or change in position of a plant or its parts, as in the opening and closing of flowers, in response to a stimulus but independent of the direction of the stimulus and caused by unequal growth of certain cells, changes in light intensity, etc.