Multiple Choice
J.William Schopf discovered a fossil cyanobacterium in Australian rocks that are 3.5 billion years old.The specific ratio of carbon isotopes (13C:12C) in the fossil indicated that the organism
A) produced atmospheric oxygen through photosynthesis.
B) produced atmospheric carbon dioxide through photosynthesis.
C) used atmospheric carbon dioxide in photosynthesis.
D) consumed carbohydrates for energy.
E) had an extraterrestrial origin.
Correct Answer:
Verified
Correct Answer:
Verified
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