I believe the correct answer to your question is, that natural selection is what determines the direction of evolution.
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Definition of natural selection- Is t</span><span>he process where organisms better adapted to their environment and tend to survive and produce more offspring. </span>
Answer:
The correct answer would be A. Electron transport chain.
In cellular respiration, all the complexes associated with electron transport chain are usually located in the inner membrane of the mitochondria.
The electrons released by the oxidation of NADH and FADH₂ are transported by various electron carriers associated with electron transport chain. The electrons are finally accepted by oxygen to form water which is released as a byproduct.
The flow of electron through the electron transport chain is coupled with the pumping of protons across the membrane which leads to the formation of proton gradient.
This gradient (chemiosmosis) is used by ATP synthase located in the inner membrane to phosphorylate ADP into ATP.
No carbon based compound is used as reactant or product in electron transport chain.
The stomach acid kills the bacteria and activates an enzyme that helps water break down food
The greatest amount of carbon is found in underwater sediments and sedimentary rocks.
