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. species had little to no need to regulate blood pressure

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23-08-2022
Biology

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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. species had little to no need to regulate blood pressure

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tripatsingh039 tripatsingh039 · Answer 1 · 2022-08-29T16:02:34+02:00

The correct answer is option B. animal was endothermic and had a high metabolic rate.

In a closed circulatory system, the blood is constantly constrained within vessels of various sizes. The heart pumps blood in this circulation, which causes mammals' metabolic rates to be high. Aves and mammals are endothermic (body temperature-regulated) creatures. Warm blooded people.

When a four-chamber heart is present, the circulation is stopped. As a fossil animal resembles aves, the alternative is to use it. Animal was endothermic, had a high metabolic rate, and a closed circulatory system.

Mammal's closest relative All endothermic animals, including birds and mammals, have fully separated ventricles and a four-chambered heart, whereas amphibians have a three-chambered heart and the majority of reptiles, with the exception of the crocodile, have a three-chambered heart. Fishes are known to have hearts with two chambers.

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