Supplement. Archaea or archaebacteria evolved separately from eubacteria and eukaryotes. They are similar with eubacteria in being prokaryotes and lacking distinct cell nucleus. They differ in terms of ribosomal structure, the possession of introns (in some species) and in membrane structure or composition.rchaea or archaebacteria evolved separately from eubacteria and eukaryotes. They are similar with eubacteria in being prokaryotes and lacking distinct cell nucleus.
Definition of COGENCY. : the quality or state of being cogent.See cogency defined for kids. ADVERTISEMENT.efinition of COGENCY. : the quality or state of being cogent.
Cf. tocology. multiparity. the condition or process of producing more than one offspring at one birth. â multiparous, adj. nativity. 1. the time, place, and circumstances of a personâs birth. 2. the configuration of the planets at the time of a personâs birth and a representation, as a chart, of that configuration. nulliparity. the condition in a woman of never having given birth.