In super-category or Domain 1 we have Archaebacteria which include forms of bacteria today that lived in the most extreme conditions such as hot springs and sulfur pools many years ago and even up to the present day. They also contain Methanogens and Halophiles. Members in this Domain are obligate anaerobes which means they do not need air to survive. The cell type of these organisms are prokaryotic as it lacks a nucleus and membranous organelles and are microscopic. They do contain a cell wall but with no peptidoglycan. The DNA is unique to Archae and as stated earlier they can withstand the most extreme environments. A very prominent place for an organism like Archaebacteria may be a sulfur pool or hot spring. Archaebacteria have similarities with prokaryotes and bacteria because they are single celled organisms with no nuclei and cell organelles. 5 examples of some Archaebacteria you might find near you are: Cenarchaeota, Haoarchaea, Euarchaeota, Lokiarchaeota and Taumarchaeota.
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