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.
Menu dropdown. To log in and use all the features of Khan Academy, please enable JavaScript in your browser. The ancient Sumerians, the black-headed ones, lived in the southern part of what is now Iraq. The heartland of Sumer lay between the Euphrates and Tigris rivers, in what the Greeks later called Mesopotamia.enu dropdown. To log in and use all the features of Khan Academy, please enable JavaScript in your browser. The ancient Sumerians, the black-headed ones, lived in the southern part of what is now Iraq. The heartland of Sumer lay between the Euphrates and Tigris rivers, in what the Greeks later called Mesopotamia.