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The Evolution of Organisms That Use Oxygen in Their Respiration

Question 44

Multiple Choice

The evolution of organisms that use oxygen in their respiration was possible only because of the action of a group of bacteria that produced oxygen and changed the Earth's atmosphere from an anoxic one to one rich in oxygen.That group of bacteria was:


A) cyanobacteria
B) spirochaetes
C) proteobacteria
D) Staphylococcus
E) actinobacteria

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