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

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

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

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

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