Which would a scientist most likely examine to locate gene mutations?

DNA

Explanation:

Comparing with multiple of the same species, and one with an abnormal tribute or dna segment? Assuming this is a trick question

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

colors do exist. the color of the sky is actually violet; humans percieve the color of the sky as blue.