The endosymbiotic theory hypothesizes that mitochondria and chloroplasts were formed when prokaryotic cells were engulfed by larger cells that were precursors to eukaryotic cells.
prokaryotic ; eukaryotic
He endosymbiotic theory hypothesizes that mitochondria and chloroplasts were formed when prokaryotic cells were engulfed by larger cells that were precursors to eukaryotic cells.
