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Mammalian basal metabolic rate is proportional to body mass2/3

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Figure 1
Figure 1

Relationship between body mass (M, g) and body temperature (Tb, °C) for eutherians (● and unbroken line; Tb = 35.8 + 0.30 log M, n = 437), marsupials (○ and broken line; Tb = 34.1 + 0.49 log M, n = 67), and monotremes (+, n = 4).

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