| 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 Archaea comes from the Greek archaios meaning ancient. (12 Dec 1998) |
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| archaeal proteins | Proteins found in any species of archaeon. (12 Dec 1998) |
| archaean | <geology> The earliest period in geological period, extending up to the Lower Silurian. It includes an Azoic age, previous to the appearance of life, and an Eozoic age, including the earliest forms of life. This is equivalent to the formerly accepted term Azoic, and to the Eozoic of Dawson. Source: Websters Dictionary (01 Mar 1998) |
Synonyms : Archaeon, Archebacteria
Synonyms : Gene Proteins, Archaeal
Synonyms : Archaeal Virus, Virus, Archaeal, Viruses, Archaeal
| Archaea | (geology) used of the earliest known rocks |
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