The earliest evidence of life on Earth dates to about 3.8 billion years ago.
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Q52: Modern birds are probably direct descendants of:
A)marsupials.
B)iguanas.
C)dinosaurs.
D)crocodiles.
Q53: Which of the following would support a
Q54: The first vertebrates to develop jaws were
Q55: Laboratory experiments suggest that many of the
Q56: Both gymnosperms and angiosperms may be pollinated
Q58: Primates first appear in the fossil record
Q59: Some of the more advanced organisms in
Q60: The metabolism-first model suggests that a self-replicating
Q61: Life first evolved in and the earliest
Q62: The eukaryotic kingdom _ has the greatest
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