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Studying mammals: A winning design
Studying mammals: A winning design

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Figure 2
Figure 2 Graph of body temperature against ambient temperature for endothermic mammals and a lizard in laboratory studies, showing the better regulation in the cat (a placental mammal) compared with monotremes (echidna and platypus) and a marsupial (opossum). Tb was measured after 2 hours of constant exposure to each Ta

 5.3 Heat production