The fact that both endothermic and exothermic vertebrates induce fever, by different mechanisms, in response to infection supports which of the following hypotheses?

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The fact that both endothermic and exothermic vertebrates induce fever in response to infection suggests that fever is not a random evolutionary mutation (genetic drift) but an adaptation that has evolved multiple times. This implies that fever may have some beneficial function in fighting off infections, supporting the hypothesis that fever is adaptive.

The Fact That Both Endothermic and Exothermic Vertebrates Induce Fever