Answer – Some examples of archaebacteria are Sulfolobus solfataricus, Pyrobaculum aerophilum,  Methanobacterium formicicum, Halobacterium salinarum,  Nitrosopumilus maritimus, and Cenarchaeum symbiosum.

Explanation:

Archaea (archaebacteria) are a group of single-celled microorganisms without a defined nucleus. They are classified into three types: Crenarchaeota (heat- and acid-tolerant), Euryarchaeota (methanogens and halophiles), and Thaumarchaeota (ammonia-oxidizing archaea). There are also other less popular species, such as Korarchaeota and Nanoarchaeota. Archaebacteria can easily survive under very harsh conditions, such as the sea bottom or volcanic vents.

Sulfolobus are acidophiles (acid-tolerant) that can be found in volcanic hot springs and acidic environments containing high sulfur content. Pyrococcus species are hyperthermophiles that live in deep-sea hydrothermal vents. They can thrive at very high temperatures. Methanobacterium species are methane-producing archaea commonly found in anaerobic environments. Halobacteria species are known for their ability to thrive in extremely salty environments. The Nitrosopumilus genus is a marine ammonia-oxidizing archaeon. Cenarchaeum species have a symbiotic relationship with certain varieties of sponge species, and they can survive at low temperatures.

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