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<p>in the laboratory.</p>

<p><big> Classification </big></p>
<p>The classification of archaea, and of prokaryotes in general, is a rapidly moving and contentious field. Current classification systems aim to organize archaea into groups of organisms that share structural features and common ancestors. These classifications rely heavily on the use of the sequence of <a href="page.php?w=ribosomal_RNA">ribosomal RNA</a> genes to reveal relationships among organisms (<a href="page.php?w=molecular_phylogeny">molecular phylogenetics</a>). Most of the culturable</p><p>
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