Living things have been present on the earth
A) only in the most recent geological era.
B) only since Pangaea split into Laurasia and Gondwana.
C) for most of its existence.
D) for all of its existence.
Correct Answer:
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Q21: The oldest division of geologic time is
A)
Q23: Each of the following elements has at
Q25: The most recent division of geologic time
Q31: Evidence suggests that large-scale biological extinctions may
Q33: Conditions for the preservation of fossils are
Q35: Radiocarbon dating is limited to the remains
Q35: Birds are descended from
A) mammals.
B) dinosaurs.
C) fish.
D)
Q36: In general, ancient forms of life are
A)
Q39: Fossils are least likely to be found
Q41: The line of descent of humans broke
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