Which CORRECTLY shows the work of enzymes in the digestive w
system?
Products
I
II
П
Enzyme Digests
lipase fats
glucose
protease protein amino acids
amylase starch glucose
protease fats fatty acids
MI
IV
A.
B.
I and II only
II and III only
III only
I and IV only
C.
D.

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.