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

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

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

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

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Micro Organisms
Which of the following best represents the hierarchy of levels of biological classification?

Class, order, kingdom, phylum, family, genus, species
Phylum, kingdom, class, order, genus, species, family
Kingdom, phylum, family, class, order, genus, species
Kingdom, phylum, class, order, family, genus, species

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