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OpenStudy (anonymous):
An isotope of carbon that is radioactive is _________. A. carbon-12 B. carbon-13 C. carbon-14 D. carbon-15
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OpenStudy (anonymous):
C
OpenStudy (anonymous):
ok
OpenStudy (anonymous):
By applying the law of superposition, _______________ dates can be determined. A. relative B. absolute C. radiometric D. isotope
OpenStudy (anonymous):
A
OpenStudy (anonymous):
Fishes were first abundant during the ... A. Precambrian B. Paleozoic C. Mesozoic D. Cenozoic i out c it was wrong
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OpenStudy (anonymous):
put*
OpenStudy (anonymous):
B or D
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