Which of the following lists organisms from YOUNGEST to OLDEST? O mammals, bacteria, fish
O bacteria, fish, mammals
O fish, bacteria, mammals
O mammals, fish, bacteria

Organize the word parts according to where they appear in a medical term.

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.