Eras are
A) divisions in geologic time divided into periods and epochs.
B) any time periods in the past.
C) divisions of time based on cultural standards, as in "Stone Age."
D) the time frames during which a certain fossil species existed.
Correct Answer:
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Q9: A stratigraphic layer in one location overwhelmingly
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Q12: The study of what happens to an
Q13: An index fossil, such as the Irish
Q15: To reconstruct and interpret evolutionary changes, it
Q16: If fossil species A is consistently recovered
Q17: Experts reconstruct the appearance of early hominids
Q18: The English surveyor who developed the technique
Q19: What is the basic difference between relative
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