Question

Tropic movment aur Nastic movment
difference in hind

Answer 1

→Nastic movements are non directional responses to stimuli such as temperature and heat. 

→The most important feature of this type of movement is that movements are not governed by the direction of the stimulus. 

→They may be induced by touch (seismonastic), temperature (Thermonastic), light, and chemicals.

→Whatever be the direction of stimulus, the movements always occur in a particular direction without reference to the direction of the stimulus

→Example of seismonastic movement is movement of Venus fly trap.

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→Tropic movement is the response to stimuli that comes from one direction.

→ It is a directional movement.

→If the movement of the plant part is towards the stimulus, then it is known as positive tropism . If the movement of the plant part is away from the stimulus, then it is known as negative tropism .

→For example phototropism, Geotropism etc.