your organism is a wolf. Mary and Amy have selected organisms for their study. Mary’s organism shares the same genus as your species, and Amy’s organism shares the same phylum as your species. Which one has more in common with your species? Explain your answer

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.