Question

plants do not have any nervous system but yet if we touch a sensitive plant some observable change take place in its lips explain how could this plant respond to the external stimuli and how it is communicated​

Answer 1

they don't have nervous system but they have indicators

if we touch a plant like mimosa then the indicators on leaf reacts and a chemical reaction takes place due to which it response to the stimuli

this is call chemotropic

Answer 2

Answer:

Plants do not have a nervous system like other animals and human beings, but they have indicators which indicate them of the external changes.

After the indicators have performed their functions, a chemical reaction takes place within the plant which is how they react to external stimuli.

This entire process is known as chemotropic.

Example – If you touch the plant mimosa you can observe it responding to your touch.