Refer to the Graph Showing Body Temperature and Heart Rate

question 250

Multiple Choice

Refer to the graph showing body temperature and heart rate in the Galápagos marine iguana as it moves from feeding in the ocean to basking on hot rocks on shore. From this graph, a logical conclusion about the iguana is that

• A) its heart rate is not regulated entirely by body temperature.
• B) the maximum body temperature it achieves when on shore is 38°C.
• C) its heart rate drops quickly in the cold ocean and rises more slowly on warm land.
• D) the lowest heart rate the animal tolerates before coming back on land is approximately 7-8 beats per minute.
• E) at comparable body temperatures, its heart rate is higher during cooling than warming.

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