What process causes athletes to experience a burning sensation in their muscles? a. lactic acid fermentation b. alcohol fermentation c. aerobic respiration d. glycolysis

Cells are adapted to preform specific functions. which of the following terms refers to this capability?

Amino acids contain the elements carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. of the 20 amino acids found in humans, 11 are called "nonessential" because they can be manufactured by the body when needed. which elements in these 11 amino acids are commonly obtained from the metabolism of sugar molecules?

What function does the limb sever in each animal? how are the limb bones of the four animals similar? based on these similarities what can be inferred about the evolution of the four animals.