The amount of energy released during aerobic respiration in animals is _____ that released during anaerobic respiration.
Greater than
In aerobic respiration, glucose is broken down completely in the presence of oxygen into carbon dioxide and water, and each glucose molecule releases about 38 ATP molecules of usable energy. In anaerobic respiration (for example, in muscle cells during hard exercise), glucose is only partially broken down into lactic acid, and this releases only about 2 ATP molecules per glucose.
So the energy released per glucose in aerobic respiration is much greater than in anaerobic respiration, not equal to or lesser than it. "Slower than" describes rate, not amount of energy, so it does not fit the question.
Hence, the answer is Greater than.
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