It is also a name for the page and a half of indecipherable foreplay used in university physics textbooks before they give you the formula for something. Engineering student: I forgot the formula for the volume of a sphere, but I was able to figure it out from the area of a circle using calculus.
Bacterial is the taxonomy, i.e. the rank-based classification, of bacteria. In the scientific classification established by Carolus Linnaeus, each species has to be assigned to a genus (binary nomenclature), which in turn is a lower level of a hierarchy of ranks (family, suborder, order, subclass, class, division/phyla, kingdom and domain).
The Archaea (/ÉËrËkiËÉ/ or /ÉËrËkeÉªÉ/ ar-KEE-É or ar-KAY-É) constitute a domain and kingdom of single-celled microorganisms. These microbes (archaea; singular archaeon) are prokaryotes, meaning that they have no cell nucleus or any other membrane-bound organelles in their cells. Archaea were initially classified as bacteria, receiving the name archaebacteria (in the Archaebacteria kingdom), but this classification is outdated. Archaeal cells have unique properties separating them from the other two domains of life, Bacteria and Eukaryota.