You Are Studying a Large Tropical Reptile That Has a High

question 36

Multiple Choice

You are studying a large tropical reptile that has a high and relatively stable body temperature. How would you determine whether this animal is an endotherm or an ectotherm?

• A) You know from its high and stable body temperature that it must be an endotherm.
• B) You know that it is an ectotherm because it is not a bird or mammal.
• C) You subject this reptile to various temperatures in the lab and find that its body temperature and metabolic rate follow the ambient temperature. You conclude that it is an ectotherm.
• D) You note that its environment has a high and stable temperature. Because its body temperature matches the environmental temperature, you conclude that it is an ectotherm.
• E) You measure the metabolic rate of the reptile, and because it is higher than that of a related species that lives in temperate forests, you conclude that this reptile is an endotherm and its relative is an ectotherm.

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