Endosymbiosis
Theory that free-living bacteria were engulfed by an ancestral cell and stayed inside as permanent partners. Origin of mitochondria (~2 billion years ago) and chloroplasts (~1.5 billion years ago).
Theory that free-living bacteria were engulfed by an ancestral cell and stayed inside as permanent partners. Origin of mitochondria (~2 billion years ago) and chloroplasts (~1.5 billion years ago).
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