The ___ Era began with the appearance of complex life, as indicated by fossils like trilobites.
A) Quaternary
B) Cenozoic
C) Mesozoic
D) Paleozoic
E) Precambrian
Correct Answer:
Verified
Q32: The half-life of the carbon 14 isotope
Q33: _ denotes the vast amount of time
Q34: _ are subdivisions of eras.
A) Ages
B) Intervals
C)
Q35: The Earth is approximately _ years old.
A)
Q36: The principle of _ states that an
Q38: By the principle of _, the surface
Q39: The _ Era is the Age of
Q40: Alvarez and others proposed a hypothesis that
Q41: Fossils are common in _.
A) all rock
Q42: Radiocarbon dating is useful in dating an
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