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
habitats which are extreme environments with regard to acidity
presence of a cell wall containing a characteristic outer membrane

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Micro Organisms
Eukaryotic cell organelles first emerged

from a specialized lineage of cells within the kingdom Protista
when prokaryotes engulfed each other and became interdependent
when bacteria made their first attempts at reproduction
just before the origin of the animal and fungal kingdoms

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