Question 23
Which of the following events directly led to the beginning of the so-called Great Oxygenation Event?
A. Evolution of cyanobacteria into multicellular organisms
B. Late heavy bombardment
C. Beginning of the Age of Ediacaran Fauna
D. The fifth mass extinction
Editorial response: Explain the scientific reasoning and the limitation or contradiction in the source choices.
A. Evolution of cyanobacteria into multicellular organisms
B. Late heavy bombardment
C. Beginning of the Age of Ediacaran Fauna
D. The fifth mass extinction
Editorial response: Explain the scientific reasoning and the limitation or contradiction in the source choices.