Which period contains the present day?
A) Tertiary
B) Quaternary
C) Cambrian
D) Carboniferous
E) Cenozoic
Correct Answer:
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Q47: This gas began to accumulate between 3
Q48: Miller and Urey demonstrated the formation of
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Q50: All of the following are TRUE of
Q51: The half-life of uranium-238 is 4.5 billion
Q53: Earth is estimated to be around
A) 6,000-8,000
Q54: If a radiometric analysis of an isotope
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Q56: The first organisms on land were
A) plants.
B)
Q57: How old are the oldest known fossils?
A)
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