Answer
A major advantage of aerobic respiration is the amount of energy it releases. Without oxygen, organisms can split glucose into just two molecules of pyruvate. This releases only enough energy to make two ATP molecules. With oxygen, organisms can break down glucose all the way to carbon dioxide. Anaerobic respiration is less energy-efficient, but allows survival in habitats which lack oxygen.
Work Step by Step
Page 69; Also Figure 2.29
