The geologic time scale is often subdivided on the basis of ____.
A) the appearance of different radioactive isotopes in different strata
B) levels of background extinction
C) periods of extensive environmental change
D) the appearance of new species
E) climate change
Correct Answer:
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Q30: The large,ancient land mass that contained all
Q31: The Coconino Sandstone,which consists mainly of weathered
Q32: Plate tectonic theory is based on _.
Q33: Which body of evidence is least supportive
Q34: The operation of natural selection depends upon
Q36: Which ancient habitat has allowed the formation
Q37: Who was the proponent of uniformitarianism?
A)
Q38: Radioactive decay can be used to measure
Q39: Natural selection drives evolution through the following
Q40: The idea that the same geologic processes,occurring
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