Question

Classify the following movement as tropic or nastic.
a) Opening of a flower
b) Roots moving downward
c) Shoots moving towards light
d) Twirling of a tendril

Answer 1

Heya!!!

a) Opening of a flower - Nastic mivement

b) Roots moving downward - Tropic mivement.

c) Shoots moving towards light - Tropic movement.

d) Twirling of tendril - Nastic movement

Answer 2

Among the following,

a) Opening of a ‘flower’ is ‘Nastic movement’.

b) Roots moving ‘downward’ is ‘Tropic movement’.

c) Shoots moving ‘towards light’ is ‘Tropic movement’.

d) Twirling of the tendril is ‘Nastic movement’.  

The tropic moments are moments in which the plant grows towards stimuli and they are gradual whereas nastic movements are sudden response to stimuli they need not be growth changes in a plant. These nastic changes are the rapid response shown by a plant.