Evolution is the slow change that takes place due to various factors leading to the formation of new characters. Its sequence is first anaerobic cells formed, photosynthesis, presence of oxygen, and finally aerobic cell.
Evolution shows the adaptations of organisms according to their changing environments and results in altered genes, novel traits, and new species.
It can occur by following process:
There comes first anaerobic cells, then photosynthesis and oxygen presence and then finally aerobic cell.
Thus, the proper sequence of events involve in the evolution of early life is anaerobic cell--photosynthesis--presence of oxygen--aerobic cell.
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