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Prokaryotic Endosymbiotic Eukaryotic Cells Describe Theory State Evidence

Front Describe the endosymbiotic theory. + state evidence
Back Endosymbiotic theory - some of the organelles in eukaryotic celles were once prokaryotic microbes which would suggest that eukaryotic cells originated from prokaryotic organisms

It is thought that mitochondria and chloroplasts were once free living prokaryotic cells because:
  • They divide by binary fission
  • They contain their own prokaryotic ribosomes (70S)
  • They have their own DNA which is circular and not linear

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