Final answer:
Some organisms that do anaerobic respiration include methanogens, sulfur bacteria, facultative anaerobic bacteria, and sulfate-reducing bacteria. Different products are made as a result of anaerobic respiration process.
Step-by-step explanation:
Some organisms that do anaerobic respiration include methanogens, sulfur bacteria, facultative anaerobic bacteria, and sulfate-reducing bacteria. Methanogens use carbon dioxide as the final electron acceptor and produce methane as a result.
Sulfur bacteria use sulfate as the final electron acceptor and produce hydrogen sulfide. Facultative anaerobic bacteria can switch between aerobic respiration and fermentation, producing different products depending on the conditions. Sulfate-reducing bacteria reduce sulfate to hydrogen sulfide to regenerate NAD+ from NADH.
Additionally, denitrifiers convert nitrate to nitrogen gas, an integral part of the nitrogen cycle. The products of anaerobic respiration vary but include methane, hydrogen sulfide, nitrogen gas, lactic acid, and ethanol depending on the organism and the conditions.