Chapter 4 - Bacteria and Archaea - 4.6 Classification Systems for Bacteria and Archaea - 4.6 Learning Outcomes-Assess Your Progress - Page 105: 16

A bacterial species is the most basic unit of classification of bacteria based on the shape, behavior, and physical and biochemical properties. There are about 30,000 species of bacteria identified to date. There can also be strains or sub-specie of species.

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