Archaea
Organisms within this domain are sometimes referred to as the extremophile prokaryotes, archaea were first discovered living in
extreme environments, but not all archaea do
Archaea are prokaryotic so have no
nucleus
They were initially classified as bacteria until several unique properties were discovered that separated them from known bacteria, including:
Unique lipids being found in the membranes of their cells
`No peptidoglycan in their cell walls
Ribosomal structure (particularly that of the small subunit) are more similar to the eukaryotic ribosome than that of the bacteria
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