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So the subject of this lecture is RNase P in the other branch of life on Earth; the Archaea. The Archaea are a group of prokaryotic organisms that are really independent of the Bacteria, and if anything are more closely related geneologically to the eukaryotes (Eukarya) than to the Bacteria. In addition to being a distinct group, they are generally primative. In many ways, the molecular biology of the Archaea probably resembles those of the ancestors of the eukaryotes, and have proven to be very useful in sorting out the simpler roots of modern eukaryotic complexity.