Organisms that are able to produce enough energy for life processes with no oxygen available are - prokaryotic organisms such as some bacteria and archaea and eukaryotic organisms such as yeast and lactic acid formation in mammals.
Oxygen is essential for most of the time in the production of energy However, many organisms carry out metabolism without oxygen, or can switch from aerobic to anaerobic cell respiration when oxygen is absent.
- Fermentation is a process that uses an organic molecule to regenerate NAD+ from NADH
- Anaerobic cellular respiration is a process that uses either inorganic molecules or organic molecules to accept electrons.
- prokaryotes use anaerobic respiration. For example, the group of archaea called methanogens reduces carbon dioxide to methane to oxidize NADH.
Thus, the correct answer is - prokaryotic organisms and some eukaryotic organisms.
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