The increase in atmospheric oxygen during the Proterozoic was most related to the ____.
A) decrease in global volcanism
B) decrease in ocean sizes
C) process of photosynthesis by bacteria
D) appearance of land plants
E) origin of complex life forms
Correct Answer:
Verified
Q18: The boundaries of subunits or smaller cratons
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Q20: Shield areas of continents are found in
Q21: _ sequences provide evidence for convergent plate
Q22: The oldest eukaryotes in the fossil record
Q24: Before the appearance of cells capable of
Q25: The Archean atmosphere can best be described
Q26: What term describes molecules that are intermediate
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Q28: By _ years ago, much of Greenland,
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