Answer the following questions based on the given figure.
a) What does the above diagram indicate?
b) Mention the terms associated with the change.
c) Define the terms mentioned in b)
d) Explain the phenomenon in brief?

Explanation

a) The above diagram indicates the drooping of leaves of 'Touch me not plant' or sensitive plant when touched.
b) Touch is called stimulus. The drooping of leaves is called responsivity of the plant.
c) On touching the leaves of the given plant, they droop down. After few minutes, the wilted leaves recover and stand erect.