Adjective
having cells that lack membrane-bound nuclei
Source: WordNetCells are classified into two main categories: simple, non-nucleated prokaryotic cells, and complex, nucleated eukaryotic cells. Source: Internet
I'm referring to the theory that the eukaryotic cell is a symbiotic union of primitive prokaryotic cells. Source: Internet
Eukaryotic and prokaryotic * Ribosomes: The ribosome is a large complex of RNA and protein molecules. Source: Internet
Further evidence of endosymbiosis are the prokaryotic ribosomes found within chloroplasts and mitochondria as well as the double-membrane enclosing them. Source: Internet
Extremophiles. 2002 December;6(6):479-83 The domain Bacteria (mainly Salinibacter ruber ) can comprise up to 25% of the prokaryotic community, but is more commonly a much lower percentage of the overall population. Source: Internet
However, Gram staining response of bacteria is an empirical criterion; it is based on the marked differences in the ultrastructure and chemical composition of the two main kinds of prokaryotic cells that are found in nature. Source: Internet