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Unformatted text preview: common ancestry o Convergent and Divergent evolution • Systematists examine similarities in external and internal structures • Systematists examine genetic similarities between o DNA sequences o Chromosomes The Domains of Life The five-kingdoms system improved classification A three-domain system more accurately reflects life’s history Kingdom-level classification remains unresolved The Two-Kingdom system Before 1969, all forms of life were classified into kingdoms Animalia Plantae (everything but animals) The Five-Kingdom System Kingdoms: o Monera o Fungi o plantae o Animalia o Protista The three-domain system Carl Woese Kingdom Monera included two very distinctly different groups o Bacteria o Archaea Three domain o Bacteria o Archaea o Eukarya Kingdom level classification o Systematists have yet to reach a consensus...
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