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.
See also argumentation; ideas; learning; logic; opinion; philosophy; questioning; understanding. analysis. the process of separating a whole into its parts to discover their function, relationship, etc. See also logic; psychology. asemia. loss or absence of the capacity to express thoughts or ideas by written, spoken, or gesticulated means. cogitation. 1. the act of meditation or contemplation. 2. the faculty of thinking. 3. a thought; a design or plan.