Micro Organisms
The unifying feature of the archaea that distinguishes them from the bacteria is

habitats which are extreme environments with regard to acidity
presence of a cell wall containing a characteristic outer membrane
cytoplasmic ribosomes that are 70S
absence of a nuclear membrane temperature

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Micro Organisms
Archeal cells usually do not contain peptidoglycan, rather contain pseudo-peptidoglycan which is mainly composed of

N-acetyltalosaminuronic acid and L-amino acids
N-acetyltalosaminuronic acid and D-amino acids
N-acetylmuramic acid and L-amino acids
N-acetylmuramic acid and D-amino acids

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