Which of the following is a limit of science?

Consider the venn diagram of plant reproduction. where in this image, areas a - d, would you insert the picture of the orange lily?

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.

Which of these definitions have been paired with the correct type of cell?