While the Monera were briefly understood to be one of five biological kingdoms, they were soon understood to comprise two kingdoms: the eubacteria and the archaebacteria (later renamed Bacteria and Archaea). The Monera kingdom included most organisms with a prokaryotic cell organization (that is, no nucleus). For this reason, the kingdom was sometimes called Prokaryota or Prokaryotae.
Prokaryotes (formerly Monera) have since been divided into two...
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While the Monera were briefly understood to be one of five biological kingdoms, they were soon understood to comprise two kingdoms: the eubacteria and the archaebacteria (later renamed Bacteria and Archaea). The Monera kingdom included most organisms with a prokaryotic cell organization (that is, no nucleus). For this reason, the kingdom was sometimes called Prokaryota or Prokaryotae.
Prokaryotes (formerly Monera) have since been divided into two domains, Archaea and Bacteria, forming the more recent three-domain system. All new schemes abandon the Monera and now treat the Bacteria, Archaea, and Eukarya as separate domains.
Prior to the five-kingdom model with its Monera kingdom, these organisms were classified as two separate divisions of plants: the Schizomycetes (bacteria) were considered fungi, and the Cyanophyta were considered blue-green algae. The latter are now considered a group of bacteria, typically called the cyanobacteria and are now known not to be closely related to...
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