Question

give two differences between tropic and nastic movement

Answer 1

1)The non directional movements in response to external stimuli that involve turgour changes is called nastic movements.

1) The directional movements due to different growths that occur in response to external stimuli are known as tropic movements.

2)the response to the stimulus is quick as it does not involve any growth.

2) the response of the stimulus is slow as it involves growth.

3) Such non directional  movements are independent of the stimulus.


3) In these movements, the direction of movement depends upon direction of stimulus.

Answer 2

Nastic movement is temporary and regulated by water content of the plant.They are independent of growth. Tropic movement is permanent and regulated by hormones of the plant. They are dependent of growth. Mimosa pudica shows Nastic movement