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.