Which statement is an example of a scientific theory? a. the amount that caffeine affects a person's heart rate differs based on the person's age. b. the earth is the third planet from the sun and has one moon, which orbits the earth. c. hummingbirds do not like the color white because they visit other colored flowers more often. d. all living organisms are composed of one or more cells, which came from pre-existing cells.

Pretty sure it's A because people can redo this test as many times as needed to verify the answer.

D. All living organisms are composed of one or more cells, which came from pre-existing cells.

Explanation:

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an adaptation is a change or process by which an organism takes to be better suited for its environment. for example; migration is a behavioral adaptation, this is needed because birds are not built to last extremely cold climates. there are different adaptations because there are different species needing to adjust to different things, bears don't migrate; they hibernate.

answer; i do believe that the correct answer is; ///mendelian genes are at specific loci on the chromosome and, in turn, segregate during meiosis;