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Cell evolution: endosymbiont theory

Currently there are two theories that try to explain cell evolution:

Some characteristics of mitochondria and chloroplasts that support the endosymbiont theory are:

  • Double membrane presence.
  • Presence of ribosomes the size of the ribosomes of prokaryotic cells (70S). 
  • Circular DNA.
  • Mitochondria and chloroplasts divide by bipartition.