f1a32aee_Evolutionary_physiology__Event
[Date] Somewhere between 3900 and 2500 Ma [Event] 
Cells resembling prokaryotes appear.These first organisms are chemoautotrophs: they use carbon dioxide as a carbon source and oxidize inorganic materials to extract energy. Later, prokaryotes evolveglycolysis, a set of chemical reactions that free the energy of organic molecules such as glucose and store it in the chemical bonds of ATP. Glycolysis (and ATP) continue to be used in almost all organisms, unchanged, to this day.
Evolutionary physiology
Event