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What is the difference between aerobic and anaerobic organisms?

Molecules and Energy Read more from
Chapter Basics of Biology

Aerobic refers to organisms that require oxygen to exist; for example, most living organisms need oxygen to stay alive. As humans, our cells get our energy by using oxygen to fuel our metabolism. Anaerobic refers to organisms that need little or no oxygen to exist; it often refers to bacteria, such as those found in the human small intestines.

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