Multiple Choice
A paleontologist finds a fragment of a fossilized vertebrate that indicates that the animal had a four-chambered heart with two atria and two ventricles; it also had two aortas, one emerging from each ventricle.The animal could have been a(n)
A) fish.
B) amphibian.
C) crocodile.
D) bird.
E) mammal.
Correct Answer:
Verified
Correct Answer:
Verified
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