Answer:
Initially, Archaea were classified as part of Bacteria, but sequencing technologies enabled them to separate these phylogenetic groups.
Explanation:
Archaea and Bacteria are different domains that belong to a kingdom known as prokaryotes. Prokaryotes are unicellular organisms that lack membrane nucleus, and any class of internal membrane, thereby they neither have organelles. These domains (Archaea and Bacteria) are primarily classified according to the level of sequence homology, being archaea organisms closer to eukaryotes compared than bacteria. Moreover, it has also been proposed that Bacteria are ancestors of eukaryotic organelles.
Due to the certain differences in their morphology and habitats, the Archea are the separate domain from domain Bacteria of life in prokaryotes.
It is considered as the different domain of life in prokaryotes. These are the most primitive type and are known as the ancient microorganisms found in extreme niches.
They also have morphological differences as well as biochemical than bacteria which are rarely to be seen in those harsh conditions on which archaea can thrive. Their reliance on ether lipids in their cell membranes. Bacteria have phospholipid membranes.
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