Look up: archaea

1. 
   Archaea
   Archaea: A unique group of microorganisms classified as bacteria (Archaeobacteria) but genetically and metabolically different from all other known bacteria. They appear to be living fossils, the survivors of an ancient group of organisms that bridged the gap in evolution between bacteria and the eukaryotes (multicellular organisms). The name Archa ...
   Found on http://www.medterms.com/script/main/art.
   
   
2. 
   Archaea
   Alternative name suggested for the Archaebacteria to emphasise the difference of this sub-kingdom from the Eubacteria.
   Found on http://www.mblab.gla.ac.uk/dictionary/
   
   
3. 
   archaea
   A unique group of microorganisms. They are called bacteria (Archaeobacteria) but they are genetically and metabolically different from all other known bacteria. They appear to be living fossils, the survivors of an ancient group of organisms that bridged the gap in evolution between bacteria and the eukaryotes (multicellular organisms). The name Ar ...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
4. 
   Archaea
   The `Archaea` are a major group of microorganisms. Originally named and sometimes still colloquially called `archaebacteria`, this latter term is deprecated since archaea are not bacteria. Like bacteria, archaea are single-celled organisms that lack nuclei and are therefore prokaryotes, classified in kingdom Monera in the traditional five-kingdom taxonomy. Although there is still uncertainty in the phylogeny, Archaea, Eukaryota and Bacteria are...
   Found on http://en.wikipedia.org/wiki/Archaea
   
   
5. 
   Archaea
   (ahr-ke´ә) in the three-domain system of classification, one of the two large divisions into which prokaryotes are grouped. They are genetically distinct from bacteria and share some features with the eukaryotes. They have a variety of shapes and sizes, may or may not have a cell wall, and occur as single cells and as f...
   Found on http://www.mercksource.com/pp/us/cns/cns
   
   
6. 
   archaea
   unicellular organisms that are prokaryotic (that is, do not have a membrane-bound nucleus and other internal units) but that differ in certain ... [8 related articles]
   Found on http://www.britannica.com/eb/a-z/a/95
   
   
7. 
   Archaea
   Is a group of recently discovered organisms that resemble bacteria. However, these organisms are biochemically and genetically very different from bacteria. Some species of the domain Archaea live in the most extreme environments found on the Earth.
   Found on http://www.physicalgeography.net/physgeo
   
   
8. 
   archaea
   Primitive prokaryotes which, until recently, were known as archaebacteria and placed in the same kingdom (Monera) as eubacteria. Largely through the work of Carl Woese and his colleagues at the University of Illinois, they are now generally recognized as being genetically and structurally distinct, ...
   Found on http://www.daviddarling.info/encyclopedi
   
   
9. 
   Archaea
   microscopic life forms that are single-celled and prokaryotic. They are divided into two distantly related groups, the Eubacteria (or 'true' bacteria), and the Archaebacteria (or Archaea). The Archaea are the most ancient form of life on Earth, having existed here for at least 3.5 billion years. Both groups make up two of the three domains of living organisms on Earth, the third being made up of...
   Found on http://www.coml.org/edu/glossary/g1.htm
   
   
10. 
    archaea
    archaea: see Archaebacteria.
    Found on http://www.infoplease.com/ce6/sci/A09127