what must happen before meiosis can begin A. the cell splits into four parts B. the chromosomes must replicate C. four haploid cells are produced D. DNA must duplicate four times

Which of the following birds remained ancient looking in the miocene epoch? a. crows b. owls c. grouses d. none of the above

The diagram shows a fossil of an ancient whale skull and a skull of a present-day whale. the ancient whale is extinct and is believed to be an ancestor of the present-day whale. what do these skulls most likely show that supports darwin’s theory of evolution? all populations can adapt and survive. only some organisms have a common ancestor. populations change slowly over time. populations rapidly become extinct.

In this case, the statement that people who exercise for an hour may have lower cholesterol levels is .