Question

define tropisms and how it is different from rostic movement three point of this question

Answer 1

the turning of all or part of an organism in a particular direction in response to an external stimulus.

Answer 2

Directional paratonic growth movements in which direction of movement depends on the direction of stimulus is called tropism.
rostic movements r nastic movements
In Nastic movements the direction of movement in plants does not depends on the direction of stimulus.

tropism is growth dependent movement
while
nastic movement is sensitive movement and is not considered as growth movement

tropism occurs in all plants
but
nastic movement occurs just in sensitive plants

the stimulus in tropism is unilateral
but stimulus in nastic is mostly diffused.




nastic is rostic(same)



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