Someone with one recessive and one dominant gene is called what?

Has regulatory areas for thirst, hunger, body temperature, water balance, and blood pressure

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.