Sally is examining some untitled diagrams. one diagram shows a cotyledon, primary leaf, and hypocotyls, whereas the other diagram shows presence of coleoptile, primary leaf, and primary root. what do these diagrams depict?

a. germinating seeds of a dicot and a monocot respectively

b. germinating seeds of a monocot and a dicot respectively

c. fertilizing ovules of a monocot and dicot respectively

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.