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.
Archaea form the third domain of life, alongside the other two domains, the Bacteria and Eukarya. The distinct archaeal lineages that have been identified include the Crenarchaeota (from the Greek 'crenos' for spring or origin) and the Euryarchaeota (from the Greek 'euryos' for diversity) (Fig. 1).