17.1 Vocabulary Binomial Nomenclature Class Classification Division Domain Family Genus Kingdom Order Phylum Taxon Taxonomy 17
17.1 Key Concepts Aristotle developed the 1 st widely accepted biological classification system Linnaeus used morphology & behavior to classify plants & animals. Binomial nomenclature uses Latin genus & specific name to give an organism a scientific name. Organisms are classified according to a nested hierarchical system 18
17.2 Modern Classification Main Idea Classification systems have changed over time as information has increased. 19
Determining Species Typological Species Concept types that have characteristics or traits in common 20 Common Goldfish Fancy Goldfish different?
Determining Species Biological Species Concept Interbreed Fertile Offspring Zorse = Sterile Phylogenetic Species Concept Evolutionary History 21
17.2 Key Concepts The definition of species has changed over time. Phylogeny is the evolutionary history of a species, evidence for which comes from a variety of studies. A molecular clock uses comparisons of DNA sequences to estimate phylogeny & rate of evolutionary change. Cladistic analysis models evolutionary relationships based on sequencing derived characters. 27
17.3 Domains & Kingdoms Main Idea The most widely used biological classification system has 6 kingdoms within 3 domains. 28
17.3 Key Concepts Domains Bacteria & Archaea contain prokaryotes. Organisms are classified at the kingdom level based on cell type, structures, & nutrition. Domain Eukarya contains 4 kingdoms of eukaryotes. Because viruses are not living, they are not included in the biological classification system. 34