The evolution of which of the following biochemical processes changed the physical and chemical nature of Earth in such a way that most life-forms had to adapt radically or become extinct?

Question

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Photosynthesis played a key role in changing the physical and chemical nature of Earth. It resulted in the accumulation of oxygen in the atmosphere, creating an oxygen-rich environment for aerobic respiration to evolve. This led to the extinction of many anaerobic organisms and the evolution of new life forms adapted to an oxygen-rich environment.

The Evolution of Which of the Following Biochemical Processes Changed