Comparisons of rRNA gene sequences to determine evolutionary relationships among cultured bacteria (e.g., those that can be grown in pure culture in the laboratory) supported all the traditional grouping that bacterial taxonomists created based on morphology, physiology, and other metabolic characteristics.

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Comparisons of rRNA gene sequences often revealed that many traditional groupings based on morphology, physiology, and other metabolic characteristics did not accurately reflect the evolutionary relationships among bacteria. This molecular approach has led to significant revisions in bacterial taxonomy.

Comparisons of RRNA Gene Sequences to Determine Evolutionary Relationships Among