Which process is the most responsible for the increase in early Earth's atmospheric oxygen levels?
Photosynthesis
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Answer:
During mitosis, when the nucleus divides, the two chromatids that make up each chromosome separate from each other and move to opposite poles of the cell. ... Mitosis actually occurs in four phases. The phases are called prophase, metaphase, anaphase, and telophase.
Explanation:
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(This is from google)
