The amniotic egg first appeared in which group of animals?
A) amphibians
B) reptiles
C) birds
D) mammals
Correct Answer:
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Q46: The Cambrian explosion followed extinction of the
Q47: Mammals arose as a dominant life-form after
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Q51: The amniotic egg was important in the
Q52: Modern birds are probably direct descendants of:
A)marsupials.
B)iguanas.
C)dinosaurs.
D)crocodiles.
Q53: Which of the following would support a
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Q55: Laboratory experiments suggest that many of the
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