Tetracoccus (bacterium)
In alpha taxonomy, taxonomy, "''Tetracoccus''" is a genus (biology), genus of the Alphaproteobacteria.See the National Center for Biotechnology Information, NCBI]webpage on ''Tetracoccus'' Data extracted from the References Further reading Scientific journals * Scientific books * Scientific databases External links

Bacteria genera Alphaproteobacteria Enigmatic bacteria taxa {{Alphaproteobacteria-stub ...
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Bacteria
Bacteria (; singular: bacterium) are ubiquitous, mostly free-living organisms often consisting of one biological cell. They constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in length, bacteria were among the first life forms to appear on Earth, and are present in most of its habitats. Bacteria inhabit soil, water, acidic hot springs, radioactive waste, and the deep biosphere of Earth's crust. Bacteria are vital in many stages of the nutrient cycle by recycling nutrients such as the fixation of nitrogen from the atmosphere. The nutrient cycle includes the decomposition of dead bodies; bacteria are responsible for the putrefaction stage in this process. In the biological communities surrounding hydrothermal vents and cold seeps, extremophile bacteria provide the nutrients needed to sustain life by converting dissolved compounds, such as hydrogen sulphide and methane, to energy. Bacteria also live in symbiotic and parasitic relationsh ...
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