Choose the best option to complete the sentence. a disease in which a person contracts rabies virus after a bite from an infected raccoon would be a disease.

Which sequence correctly shows the path of carbon dioxide during repiration?

What is the next step in muscle contraction after the actin changes shape? (apex)

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.