Which of the following organisms is most likely to have the highest total annual energy expenditure per unit mass?

Name: Which of the following organisms is most likely to have the highest total annual energy expenditure per unit mass?
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Question

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Mice have a higher metabolic rate per unit mass compared to larger animals like elephants, horses, and humans. This higher metabolic rate means they expend more energy per unit mass to maintain bodily functions.

Which of the Following Organisms Is Most Likely to Have