> Even today, eukaryotes live symbiotically with prokaryotes in a way that is impossible to disaggregate. Don’t forget mitochondria, the cellular organelles th

> Even today, eukaryotes live symbiotically with prokaryotes in a way that is impossible to disaggregate. Don’t forget mitochondria, the cellular organelles that are responsible for cell respiration: > Mitochondria and chloroplasts likely evolved from engulfed prokaryotes that once lived as independent organisms. At some point, a eukaryotic cell engulfed an aerobic prokaryote, which then formed an endosymbiotic relationship with the host eukaryote, gradually developing into a mitochondrion. https://www.nature.com/scitable/content/the-origin-of-mitochondria-and-chloroplasts-14747702/ https://www.nature.com/scitable/content/the-origin-of-mitoch...