Ok so in science im taking a test and a question is which statement describes natural selection?
A it is the primary mechanism.
B it must act on structural traits.
C it acts to cause overpopulation.
D it causes learned skills to become heritable traits.

Aclient with legionnaires' disease is prescribed azithromycin, 500 mg on the first day, and then 250 mg on days 2 through 5. after completing the therapy, how many grams of the drug has the client received? enter the number only.

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

Which of the following is true of metabolism in its entirety in all organisms? a) metabolism depends on a constant supply of energy from food. b) metabolism uses all of an organism's resources. c) metabolism consists of all the energy transformation reactions in an organism. d) metabolism manages the increase of entropy in an organism.