a doctor who administers agents that cause loss of sensation during surgery anasthesiologist a doctor specializes in treatment of disease using high-energy radiation
The word phylum (plural: phyla) is a category used to classify marine organisms. In this article, you can learn the definition of phylum, how it is used, and examples of phyla used to categorize marine life.
In that system, bacteria are members of the domain Bacteria and phylum is the rank below domain as the rank kingdom is disused at present in bacterial taxonomy.In this classification scheme, Bacteria is (unofficially) subdivided into over 29 phyla with representatives cultured in a lab.any major clades of bacteria that exist but cannot currently be cultured are known solely via metagenomics and are called candidate phyla. If these are included, the number of phyla is 52 or higher. Therefore, the number of major phyla has increased from 12 identifiable lineages in 1987, to 52 as of 2003.