Benthos.
Organisms are abundant in surface sediments of the continental shelf and in deeper waters, with a great diversity found in or on sediments.
Hope this helps a bit.
Four ATP molecules are produced during the Krebs cycle. The final step of cellular respiration is the electron transport chain.
What's true of any eukaryotic cell, because whether or not they are in a multicellular organism they still contain this one characteristic, is that they contain a nucleus. A nucleus is a membrane-bound organelle inside a eukaryotic cell, and this cannot be found in any prokaryotic cells such as bacteria or archaeans. The other three characteristics can all be found in bacteria and archaea.
