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Phylogenetics - Phylogenetics Phylogeny The evolutionary...

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1 Phylogenetics Phylogenetics Phylogeny_____ The evolutionary history of a species or group of related species Outline circle6 Key concepts circle6 Binomial circle6 Classification categories circle6 Three domains and six kingdoms circle6 Understanding Phylogenies circle6 Examples of Using Phylogenetis circle6 Key Terms circle6 Conclusions Key Concepts: circle6 Phylogeny _____ The evolutionary history of a species or group of related species circle6 Systematics Field of biology that deals with the diversity of life. Systematics is usually divided into the two areas of Phylogenetics and Taxonomy . circle6 Taxonomy is the science of describing, naming, and classifying organisms circle6 Classification is the arrangement of organisms by their physical similarities, which reflect historical and evolutionary relationships
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2 Key Concepts: circle6 Phylogenetics -- Field of biology that deals with the relationships between organisms. It includes the discovery of these relationships, and the study of the causes behind this pattern Binomial Binomial circle6 Millions of kinds of organisms exist circle6 In 18 th Carolus Linneaus developed modern binomial nomenclature Each species has two unique names – hence binomial Genus Specific epithet Each is italicized or underlined Genus name is capitalized; species name is not
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3 Texas Bluebonnet Lupinus texensis / Lupinus texensis circle6 The Linnean system, first formally proposed by Linneaus in Systema naturae in the 18th century, has two main characteristics. Each species has a two-part name. Species are organized hierarchically into broader and broader groups of organisms. Taxonomy employs a Taxonomy employs a hierarchical system of hierarchical system of classification classification
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4 Taxonomic Taxonomic Levels circle6 Domain circle6 Kingdom circle6 Phylum circle6 Class circle6 Order circle6 Family circle6 Genus circle6 Species Here, domestic cat Classification Schemes Reflect Scientific Classification Schemes Reflect Scientific Knowledge and Technology 1 Prior to 1970: two-kingdom system Plants and animals 2 1969: Roger Whittaker-five-kingdom system Monera, Protista, Fungi, Plantae, Animalia 3 Recent proposal: Carl Woese-three-domain system Bacteria, Archaea, Eukarya How Many Kingdoms?
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