Over time, the carbon isotope14C decays into ____.
A) 12C
B) 14N
C) 12N
D) 13C
E) 12B
Correct Answer:
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Q2: Which element is least useful for dating
Q3: If the entire history of the Earth
Q4: Fossils are predominantly found in _.
A) metamorphic
Q5: The first dinosaur fossils were discovered in
Q6: The time interval used to measure the
Q8: Angiosperms first appeared during the _ period.
A)
Q9: Most dinosaurs died out by the end
Q10: According to the geological time scale, which
Q11: During the Cretaceous period, _.
A) mammals diversified
Q12: Mammals underwent an evolutionary "explosion", or major
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