Multiple Choice
What is the significance of the specific ratio of carbon isotopes (13C:12C) in microfossils found in Australian sediments that are 3.5 billion years old?
A) The ratio occurs only where photosynthesis has occurred.
B) The ratio is a method for confirming the geological age of the rocks.
C) Carbon occurs only in fossils of living organisms.
D) The ratio occurs only in meteorites from extraterrestrial sources.
E) The ratio indicates there were hydrothermal vents in the region 3.5 billion years ago.
Correct Answer:
Verified
Correct Answer:
Verified
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