On the earth, there are several scientific classifications for animals of all types, whether scaled, feathered, or furry. when is comes to animals, all are under certain kingdoms. which of the following would represent animals that are very closely related to one another?

groups
genus
species
families

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.