Which is required for the light independent reactions in photosynthesis to occut?
water
sunlight
o oxygen
carbon dioxide

one would be wind another would be water density

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms