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.
All Sumerian cities recognized a number of gods in common, including Anu the sky god, Enlil the lord of storms, and Ishtar the morning and evening star. The gods seemed hopelessly violent and unpredictable, and one's life a period of slavery to their whims.