BSC 2005 TOP Study Guide Exam Questions and CORRECT Answers

Define prokaryote.Single-celled; DNA is NOT contained in a nucleus; Lacks membrane-bound organelles; Very small - about 1/10th the width of a human hair - 1-10 microns Summarize the two main groups of prokaryotes, and their phylogenetic relationships to the common ancestor of all life, and to eukaryotes.Bacteria and Archaea. The Bacteria and Archaea are made up entirely of microorganisms; the Eukarya contains plants, animals, and microorganisms such as fungi and protists. A phylogenetic tree traces the evolutionary history of organisms and indicates common ancestors. We already see a major difference between archaea and bacteria from this classification: they have a different evolutionary history as they occupy very different places on the Tree of Life. The Bacteria and Archaea have been grouped together and called Prokaryotes because of their lack of a nucleus, but the Archaea are more closely related to the Eukaryotes than to the Bacteria