Oxygen-18

... the inner and outer membranes) . Electrons released by NAD and FAD are transferred down an energy gradient in the ETS to their ground state where oxygen is there to accept them to form water. Energy released by electrons is used by the giant protein ATPase to form the energy currency ATP. A total ...

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... for chloroplasts in plant cells. These are mutations in a way I guess, but more of an incorporation for the mutual interest of thriving when oxygen was beginning to accumulate in the atmosphere.

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Maybe not necessarily big noses, but big nostrils. Bigger nostrils to breath more air in. You would need to breath more air if it contained less oxygen as it might have way back at the beginning of the neanderthal man. And like you stated, perhaps this dominant gene stayed within the gene pool ...

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... glucose is broken down through investment of ATP into several intermediates eventually creating pyruvate and 2 net ATP. Because of the lack of oxygen this reaction does not proceed to normal aerobic respiration in the mitochondria but instead continues to transform into other intermediates ...

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Why not sequence the axolotl, the starfish and others, and compare it to our own? There is definitely merit in examining oxygen intake. Ologists of some sort measured the oxygen level in a bubble encased in amber and found it to be around 31-38%. I was taught in school that O2 was ...

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