Most of the trees in the photograph of denali park, alaska, are evergreen spruce. the soil in this area is rich and acidic. what biome is denali park located in? a) taiga b) tundra c) arctic forest d) temperate forest

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.