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Unformatted text preview: and have no cell walls. This latter characteristic distinguishes them from the other bacteria (where cell walls are prominent). Mycoplasmas can cause a type of pneumonia. Another type of bacteria is the archaebacteria. Archaebacteria are ancient species of bacteria identified in recent years. They are separated from the other bacteria on the basis of their ribosomal structure and metabolic patterns. Archaebacteria are anaerobic species that use methane production as a key step in their energy metabolism. They are found in marshes and swamps. Some scientists believe there are two major subdivisions of bacteria: the Archaebacteria and all others, which they designate Eubacteria....
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- Fall '07