Needs to be answerd right away, a mutagen is a)a living thing that has undergone a mutation. b)an agent that causes a mutation in dna. c)a mutation that has affected one gene. d)a chemical that can poison living cells.

Variety of living organisms; includes genetic, species, and ecological types.

Which of the following words best matches this definition: the process in which the best adapted organisms survive and pass on their traits, while those that are not well adapted do not survive to pass on their traits. question 3 options: acquired selection natural selection artificial selection organic selection

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