Question

what is STIMULI and STIMULUS?..​

Answer 1

Answer:

a detectable physical and chemical change in organism's internal or external environment... both are same bro.. just stimuli is the plural form of stimulus.. hope it will help u.. thank u..

Answer 2

$\huge\underline\mathfrak{Answer!!}$

The changes in the environment to which the organisms respond and react are call stimuli

✪ The living organisms show response to stimuli such as light heat , cold , sound, etc

For example:

if a man touch a Very hot utensils accidentally , he quick pulls his hand away from the hot utensils.

Note :

Here, heat is the stimulusand the man act by moving his hand away from the hot utensils.