Introduction (from Wikipedia). The Archaea constitute a domain or kingdom of single-celled microorganisms. These microbes are prokaryotes, meaning that they have no cell nucleus or any other membrane-bound organelles in their cells. Bacteria constitute a large domain of prokaryotic microorganisms.ut it was discovered that archaea have a distinct evolutionary history and biochemistry compared with bacteria. The similarities are that archaea and eubacteria are single-celled organisms that do not have a nucleus or organelles.
cohort noun [C ]. âº a âgroup of âpeople who âshare a characteristic, usually age: About 42% of women in this age cohort have a college degree. This year's cohort of âgraduates will have particular difficulties âfinding âjobs.ohort noun [C ]. âº a âgroup of âpeople who âshare a characteristic, usually age: About 42% of women in this age cohort have a college degree. This year's cohort of âgraduates will have particular difficulties âfinding âjobs.
The basic structure of the army is as follows: Contubernium: (tent group) consisted of 8 men. Centuria: (century) was made up of 10 contubernium with a total of 80 men commanded by a centurion Cohorts: (cohort) included 6 centuriae or a total of 480 fighting men, not including officers.In addition the first cohort was double strength but with only 5 centuriae instead of the normal 6.enturia: (century) was made up of 10 contubernium with a total of 80 men commanded by a centurion Cohorts: (cohort) included 6 centuriae or a total of 480 fighting men, not including officers. In addition the first cohort was double strength but with only 5 centuriae instead of the normal 6.