During which phase in the cell cycle does mitosis happen? *

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above

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.

Babies with very low or very high birth weight are less likely to survive. observe a graph of the data.