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Endosymbiotic Theory “Everything you need to know”. Endosymbiotic Theory Prokarytic cells developed into Eukaryotic Cells. They evolved by developing a symbiotic relationship with a primative aerobic bacteria and a cyanobacteria How? Endocytosis or engulfing

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## Endosymbiotic Theory “Everything you need to know”

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**Endosymbiotic Theory**• Prokarytic cells developed into Eukaryotic Cells. • They evolved by developing a symbiotic relationship with a primative aerobic bacteria and a cyanobacteria • How? Endocytosis or engulfing • Result? Evolution of eukaryotic cells**The Endosymbiotic Theory proposes that:**• Aerobic Bacteria became Mitochondria • Cyanobacteria became • Chloroplast**Endosymbiont Theory**Support for this Theory: • Same size and structure as bacteria • Have their own DNA that is different from the DNA of the nucleus • Divide similarly- binary fission**Endosymbiont Theory**• Chloroplasts and Mitochondria are descendants of once free-living prokaryotes that were engulfed by larger cells… establishing a symbiotic (mutually beneficial) relationship.

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