Which of these is the smallest structure?
a. protein
b. polypeptide
c. dipeptide
d. amino acid

4. how does a phospholipid behave in water? the phosphate head does not mix with water; the fatty acid tails do. the phosphate head and the fatty acid tails mix with water. the phosphate head and the fatty acid tails do not mix with water. the phosphate head mixes with water; the fatty acid tails do not.

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

In a cladogram' when does a group of organisms branch off