Multiple Choice
A large reserve of methane is found in a pocket below the ocean floor and isotope analysis revealed that the 13C/12C ratio is lower than that predicted by the natural occurrence of these isotopes.This finding suggests that the methane was produced by ______.
A) a geochemical process
B) the metabolic activity of microorganisms
C) a radioactive decay process
D) oxidation of sulfite
Correct Answer:

Verified
Correct Answer:
Verified
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