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.
Up until the late 20th century Bacteria and Archaea were part of the same domain and were viewed as very similar organisms. It wasn't until Carl Woese identified in 1977 that Archaea were unique enough to warrant their own classification with their own phylogenetic ancestry.