Is there any organism that can survive without oxygen?
Yes, there are some organisms that can survive without oxygen. These organisms are called anaerobic organisms or anaerobes. They do not use oxygen to produce energy, but instead rely on other sources such as fermentation, sulfate reduction, or methanogenesis. Some examples of anaerobic organisms are:
- Yeast: Yeast is a type of fungus that can live without oxygen. It uses fermentation to break down sugars and produce ethanol and carbon dioxide. Yeast is used to make bread, beer, wine, and other products.
- E. coli: E. coli is a type of bacteria that can live with or without oxygen. It uses fermentation to produce lactic acid, ethanol, or other organic acids when oxygen is absent. E. coli is found in the intestines of humans and animals and can cause infections if it enters the bloodstream or other organs.
- Clostridium: Clostridium is a genus of bacteria that can only live without oxygen. It uses various types of fermentation to produce acids, alcohols, gases, and toxins. Some species of Clostridium cause diseases such as tetanus, botulism, and gangrene.
Recently, scientists discovered the first animal that can live without oxygen. It is a parasite called Henneguya salminicola that infects salmon. It has lost its mitochondrial genome, which means it cannot use oxygen to produce energy at all. It is not clear how it gets its energy, but it may steal it from its host.
I hope you found this answer helpful and informative.

Source:
(1) Animal that doesn't need oxygen to survive discovered. [ Ссылка ].
(2) Scientists discovered the first animal that doesn't need oxygen to live .... [ Ссылка ].
(3) Can We Live Without Oxygen? - BYJUS Blog. [ Ссылка ].
(4) Name two organisms which can live without oxygen how do they ... - BYJU'S. [ Ссылка ].
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