Aerobic respiration is a form of respiration that occurs in the presence of oxygen. On the contrary, anaerobic respiration is another form of respiration that occurs in the absence of oxygen. From a technical perspective, when glucose is broken down in the presence of oxygen, aerobic respiration is said to have occurred. If glucose is broken down in the absence of oxygen, anaerobic respiration is said to have occurred. Energywise, aerobic respiration is more efficient as it produces more energy than anaerobic respiration.
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Main Article: Aerobic And Anaerobic Respiration