Archaebacteria and Eubacteria

Archaebacteria are ancient bacteria that live in extreme conditions (extremophiles) such as thermal vents, anaerobic conditions and highly acidic conditions.They include methanogens such as Methanopyrus kandleri, which grows between 84 and 110°C.All methanogens that produce methane as a byproduct of their energy metabolism for ATP generation are archaea.They can be found in marine and freshwater sediments, wetlands, the digestive tracts of animals, wastewater treatment plants, rice paddy soil, and landfills.Eubacteria are most bacteria found in common environments. They are also known as true bacteria.