Question

What is the reaction of a living organism to a stimuli called?

Answer 1

The reaction or ability of an organism or organ to respond to external stimuli is called 'response to stimuli' or we can say 'sensitivity'

Answer 2

Explanation:

In physiology, a stimulus is a detectable change in the physical or chemical structure of an organism's internal or external environment. The ability of an organism or organ to detect external stimuli, so that an appropriate reaction can be made, is called sensitivity.