Describe the features of sharks from the Cenozoic era

Anybody who knows ap biology, can you friend or message me

Which of the following best describes the relationship between glucose and complex molecules such as hormones?

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.