Archaebacteria
Archaebacteria is a unicellular prokaryotic organism that usually lives in very harsh environments. They can live in such environments like places that have low amounts of water or places that have high concentrations of salt. These organisms, such as halophiles,are both autotrophic and heterotrophic meaning that they get their energy from the sun and by consuming other organisms. Since it may be difficult to survive and find mating pairs, they reproduce asexually. A common characteristic that is in all archaebacteria is that their cell walls don't have peptidoglycans, a substance made up of sugars and amino acids. This makes peptidoglycan a very mushy substance.
Methanospirillum hungatei (top left), Methanobacterium thermoautotrophilium (top right), Thermoacidophiles (left), Methanobacterium rumihantium (right),Methanogenium thermophillium (bottom left)
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