The earliest signs of life appeared on Earth during the ____.
A) Archean
B) Paleozoic
C) Mesozoic
D) Cambrian
E) Cenozoic
Correct Answer:
Verified
Q8: Angiosperms first appeared during the _ period.
A)
Q9: Most dinosaurs died out by the end
Q10: According to the geological time scale, which
Q11: During the Cretaceous period, _.
A) mammals diversified
Q12: Mammals underwent an evolutionary "explosion", or major
Q14: Which group of animals are living representatives
Q15: Dinosaurs flourished during the _ era.
A) Archaean
B)
Q16: A paleontologist estimates that when a particular
Q17: The analysis of large-scale changes in morphology
Q18: Which adaptation is least likely to be
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