Give Two Examples Of Archaebacteria Kingdom.
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Archaea usually have a single circular chromosome, with as many as 5,751,492 base pairs in Methanosarcina acetivorans, the largest known archaeal genome. The tiny 490,885 base-pair genome of Nanoarchaeum equitans is one-tenth of this size and the smallest archaeal genome known; it is estimated to contain only 537 protein-encoding genes.
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The Archaea evolved over 3 billion years ago but were only formally proposed as a domain 20 years ago. Today, many of the unique features and many of those that are shared with either the Bacteria.
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Timeline of biology and organic chemistry. Aristotle attempted a comprehensive classification of animals. His written works include Historion Animalium,. Nanoarchaeum equitans is a species of marine Archaea that was discovered in 2002 in a hydrothermal vent off the coast of Iceland on the Kolbeinsey Ridge by Karl Stetter.
Nanoarchaeum equitans, were originally identified by microscopy but could not be classified as part of any domain, because the SSu rrNA probes were not suffi-ciently similar to be able to hybridize40. It was only after shotgun sequencing of the genome and subsequent iden - tification of the 16S rrNA gene that N. equitans could.