Question

When we touch Mimosa, our touch acts as ______ for the plant and it closes its leaves in return.

• A. stimulus
• B. response
• C. adaptation
• D. acclimatisation

Answer 1

The correct option is A stimulus

Any change in the external or internal environment of the organisms which causes a response in the whole organism or any of its part is known as stimulus.
When we touch Mimosa, our touch acts as stimulus and it closes its leaves in turn. The closing of the leaves is the response of the plant to the change in the environment.