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Archaea (other)
Archaea is a domain of single-celled organisms. Archaea or archea may also refer to: * Archaea (spider), ''Archaea'' (spider), an extinct genus of Archaeidae *Archaea (journal), ''Archaea'' (journal), published by Hindawi See also

* Archaic (other), an earlier or ancient period or practice * Archean, or Archæan, an early geological eon * "archaeo-" ('ancient'), List of commonly used taxonomic affixes, a commonly used taxonomic affixes * Arcaea, a rhythm game developed and published by lowiro {{disambiguation ...
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Archaea
Archaea ( ) is a Domain (biology), domain of organisms. Traditionally, Archaea only included its Prokaryote, prokaryotic members, but this has since been found to be paraphyletic, as eukaryotes are known to have evolved from archaea. Even though the domain Archaea Cladistics, cladistically includes eukaryotes, the term "archaea" (: archaeon , from the Greek "ἀρχαῖον", which means ancient) in English still generally refers specifically to prokaryotic members of Archaea. Archaea were initially Taxonomy (biology), classified as bacteria, receiving the name archaebacteria (, in the Archaebacteria Kingdom (biology), kingdom), but this term has fallen out of use. Archaeal cells have unique properties separating them from Bacteria and Eukaryote, Eukaryota. Archaea are further divided into multiple recognized phylum, phyla. Classification is difficult because most have not been Isolation (microbiology), isolated in a laboratory and have been detected only by their Gene, gene s ...
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Archaea (spider)
''Archaea'' is an extinct genus of spiders in the family Archaeidae. , four species are placed (or possibly placed) in the genus. All have been found preserved in amber, either from the Baltic or Bitterfeld, Germany. First described in 1854, ''Archaea'' species have a distinctive "neck" separating the head from the thorax, and very long chelicerae ("jaws"). Description In the genus ''Archaea'', the head is separated from the thorax by a deep fold, forming a "neck", so that the globular head appears to sit on the thorax. There are eight eyes, four on each side of the head, arranged in the shape of a rhombus, with the front eyes being the largest. The curved chelicerae are very long, longer than the head, with long, strong fangs. The pedipalps of the female are very small and thin, shorter than the chelicerae, the third and last segments being short, the latter needle-shaped. Those of the male are sturdier, the third segment being almost as long as the second, with the end segment ...
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Archaea (journal)
This is a list of academic journal An academic journal (or scholarly journal or scientific journal) is a periodical publication in which Scholarly method, scholarship relating to a particular academic discipline is published. They serve as permanent and transparent forums for the ...s published by Hindawi. A B C D E G H I J L M N O P Q R S T U V W References {{Reflist External linksList of journals published by Hindawi * Hindawi ...
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Archaic (other)
Archaic may refer to: * Archaic Period (several meanings), archaeological term used to refer to a very early period differing by location *Archaic humans, people before ''homo sapiens'' * ''Archaic'' (comics), a comic-book series created by writer James Abrams and artist Brett Marting *Archaism, an archaic word or style of speech or writing. See also * * * Archaea, several meanings * Archean The Archean ( , also spelled Archaean or Archæan), in older sources sometimes called the Archaeozoic, is the second of the four geologic eons of Earth's history of Earth, history, preceded by the Hadean Eon and followed by the Proterozoic and t ...
, a geological eon {{disambig ...
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Archean
The Archean ( , also spelled Archaean or Archæan), in older sources sometimes called the Archaeozoic, is the second of the four geologic eons of Earth's history of Earth, history, preceded by the Hadean Eon and followed by the Proterozoic and the Phanerozoic. The Archean represents the time period from (million years ago). The Late Heavy Bombardment is hypothesized to overlap with the beginning of the Archean. The Huronian glaciation occurred at the end of the eon. The Earth during the Archean was mostly a ocean world, water world: there was continental crust, but much of it was under an ocean deeper than today's oceans. Except for some rare Relict (geology), relict crystals, today's oldest continental crust dates back to the Archean. Much of the geological detail of the Archean has been destroyed by subsequent activity. The Earth's atmosphere was also vastly different in atmospheric chemistry, composition from today's: the prebiotic atmosphere was a reducing atmosphere rich in ...
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List Of Commonly Used Taxonomic Affixes
This is a list of common affixes used when scientifically naming species, particularly extinct species for whom only their scientific names are used, along with their derivations. *a-, an-: ''Pronunciation'': /ə/, /a/, /ən/, /an/. ''Origin'': (''a, an-''). ''Meaning'': a prefix used to make words with a sense opposite to that of the root word; in this case, meaning "without" or "-less". This is usually used to describe organisms without a certain characteristic, as well as organisms in which that characteristic may not be immediately obvious. *:Examples: '' Anurognathus'' ("tailless jaw"); '' Apus'' ("footless"); '' Apteryx'' ("wingless"); ''Pteranodon'' ("wings without teeth"); Anura ("tailless"); '' Anophthalmus'' ("eyeless") *-acanth, acantho-: ''Pronunciation'': /eɪkænθ/, /eɪkænθoʊ/. ''Origin'': (''ákantha''). ''Meaning'': spine. *:Examples: '' Acanthodes'' ("spiny base"); '' Acanthostega'' ("spine roof"); coelacanth ("hollow spine"); '' Acrocanthosaurus'' (" ...
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