hypothesis about the origin of eukaryotic cells

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The theory on the origin of the eukaryotic cells was believed to have started 3.5 - 2.7 bya (billion years ago) where there are only prokaryotic cells thriving the surface of the earth. As the temperature of the earth has increased, some of the prokaryotic cells have died and some have survived under the rocks, below the water levels and in humid places. From there on the existing prokaryotic cells needed to survive which gave way to the process of endosymbiosis.

The endosymbiotic evolution of the eukaryotic cells  is composed of three characters:...

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