What is the function of cilia in the respiratory system? A. Move gases into the blood. B. Move food into the stomach. C. Move mucus into the throat. D. Move air into the lungs

The leopard frog and the pickerel frog are two closely related species. in areas where their ranges overlap, the frogs will remain separate species if they

Why is taking care of yourself a time management techique

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.