Endosymbiosis

Endosymbiotic Theory Prokaryotic cells developed into eukaryotic Cells. They evolved by creating a symbiotic (beneficial) relationship with a primitive aerobic bacteria and a cyanobacteria How: Endocytosis or engulfing (cell eating) Result: Evolution of eukaryotic cells

The theory proposes that: Aerobic Bacteria became mitochondria Cyanobacteria became chloroplasts

Endosymbiotic 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

Endosymbiotic Theory Chloroplasts and Mitochondria are descendants of once free-living prokaryotes that were engulfed by larger cells…establishing a symbiotic relationship.