Question

which statement best explains why fermentation occurs in mammals? it allows glycolysis to continue under anaerobic conditions by replenishing nad⁺. it enables mammals to generate additional atp in an oxygen - rich environment. it breaks down lactic acid to generate a small amount of atp under anaerobic conditions. it generates ethanol, which can be used as an alternative source of energy. it produces an acid that maintains blood ph within a narrow range.

Explanation:

Fermentation in mammals occurs under anaerobic conditions. Glycolysis requires NAD⁺. Fermentation replenishes NAD⁺ to keep glycolysis going. It doesn't generate additional ATP in oxygen - rich environments, doesn't break down lactic acid to generate ATP in mammals (lactic acid is a product), doesn't produce ethanol in mammals, and isn't mainly for maintaining blood pH.

Answer:

It allows glycolysis to continue under anaerobic conditions by replenishing NAD⁺.