What is the net force?
What is the direction right, left, up, down or no motion

Which element forms the basis of all organic organisms a carbon b oxygen c hydrogen d nitrogen

The carrier molecules of the electron transport system are located in the

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.