The processes that use the mechanisms are: Cellular respiration â ATP is generated by oxidation of organic molecules, the passage of electrons down an electron transport chain, and chemiosmosis. The final electron acceptor is almost always inorganic. Aerobic â the final electron acceptor is O 2.
The Sumerians lived in Mesopotamia around 4000 BC. Mesopotamia or the Fertile Crescent was a region in the Middle East between the Tigris and Euphrates rivers, in the territory of modern Iraq, Iran and Syria.
Ancient Sumerians. Ancient Sumerians  The Cradle of Civilization. The Anicent Sumerians are thought to be one of the first urban societies. In 4000 B.C., human beings in many parts of the world still hunted their prey, tended sheep, and lived in caves or huts.