Can someone explain how proteins move from the manufacturing point through the membrane

Based on the law of dominance, we would expect percent of the offspring from this cross to have large teeth.

Eutrophication caused by human nutrient pollution.

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.