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.
The land of Sumer, to the south of Mesopotamia, was part of the rich Tigris-Euphrates Valley. The Sumerian civilization thrived in the regions that are now part of Iraq.Historical evidence shows that the Sumerian Civilization dates back to about 6500 BC Sumer is among the oldest known civilizations of the world.r had been an important city-state in Sumer on the banks of the Euphrates. Between 1922 and 1934, Woolley discovered the site of many ancient Sumerian tombs including the tomb of Queen Puabi. The Royal Tombs of Sumer date back to 2600 BC.