An Anthropologist Discovers the Fossilized Heart of an Extinct Animal

question 72

Multiple Choice

An anthropologist discovers the fossilized heart of an extinct animal. The evidence indicates that the organism's heart was large, was well formed, and had four chambers, with no connection between the right and left sides. A reasonable conclusion supported by these observations is that the ________.

• A) animal had evolved from birds
• B) animal was endothermic and had a high metabolic rate
• C) animal was most closely related to alligators and crocodiles
• D) animal was likely an invertebrate animal
• E) species had little to no need to regulate blood pressure

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