Employability skills are generally divided into three skill sets: (a) basic academic skills, (b) critical thinking skills and (c) personal qualities. The three skill sets are typically broken down into more detailed skill sets.
In the past Archaea were classified as an unusual group of bacteria and named archaebacteria, but since the Archaea have an independent evolutionary history and manifest numerous differences in their biochemistry from other forms of life, they are now classified as a separate domain in the three-domain system.
The archaea were originally classified under prokaryotes as archaebacteria, however this classification is now considered outdated. Archaea is now a proper domain in a three-domain system for a type of single-celled organisms as they have an independent history and has many differences from other microorganisms.