Question

(a) Plants do not have any nervous system but yet, if we touch a sensitive plant, some observable changes take place in its leaves. Explain how could this plant respond to the external stimuli and how it is communicated.
(b) Name the hormone that needs to be administered to
(i) increase the height of a dwarf plant.
(ii) cause rapid cell division in fruits and seeds.

Answer 1

Answer:

this plants respond to the external stimuli by three types of para tonic for mens named as number 1 tactic movement number 2 tropic movement number 3 nastic movement.

Explanation:

tactic movement are the locomotion done by plant due to some external stimuli or change in the environment.

the growth movement in plants are known as tropic movement.

well nastic movement are the movement in plant that takes takes place due to the intensity of the stimulus.

the hormone that needs to be administrator is auxin.and II that causes rapid cell division in fruits and seeds well it should be gibberellin.