BioEd Online Diversity of Life: Introduction to Biological Classification By Deanne Erdmann, MS BioEd Online.

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BioEd Online Diversity of Life: Introduction to Biological Classification By Deanne Erdmann, MS BioEd Online

BioEd Online Why Do We Classify Organisms? Biologists group organisms to represent similarities and proposed relationships. Classification systems change with expanding knowledge about new and well-known organisms. Tacitus bellus BioEd Online

BioEd Online Leucaena leucocephala Lead tree Classification Binomial Nomenclature Two part name (Genus, species) Hierarchical Classification Seven Taxonomic Catagroies Systematics Study of the evolution of biological diversity BioEd Online

BioEd Online Carolus von Linnaeus ( ) Swedish scientist who laid the foundation for modern taxonomy Binomial Nomenclature Carolus von Linnaeus Two-word naming system Genus Noun, Capitalized, Underlined or Italicized Species Descriptive, Lower Case, Underlined or Italicized BioEd Online

BioEd Online Nomenclature: Genus Which of the following is a correctly written Genus name? A) tacitus B) Tacitus C) Tacitus D) tacitus

BioEd Online Nomenclature: Species Which of the following is a correctly written Species name? A) bellus B) Bellus C) Bellus D) bellus

BioEd Online Nomenclature: Scientific Name Which of the following is a correctly written Scientific name? A) Tacitus bellus B) Tacitus bellus C) tacitus Bellus D) Tacitus Bellus

BioEd Online Hierarchical Classification Taxonomic categories DomainDear KingdomKing PhylumPhilip ClassCame OrderOver FamilyFor GenusGreen SpeciesSoup BioEd Online

BioEd Online Hierarchical Classification Species Genus Family Order Class Phylum Kingdom Domain BioEd Online More kinds Fewer kinds

BioEd Online Classification Which of the following would have the greatest variety of organisms? A) DomainB) Kingdom C) PhylumD) Class E) OrderF) Family G) GenusH) Species

BioEd Online Kingdoms and Domains BacteriaArchaeaEukarya BacteriaArchaeaProtistaPlantaeFungiAnimalia MoneraProtistaPlantaeFungiAnimalia The three-domain system The six-kingdom system The traditional five-kingdom system BioEd Online

BioEd Online Systematics: Evolutionary Classification of Organisms Systematics is the study of the evolution of biological diversity, and combines data from the following areas. Fossil record Comparative homologies Cladistics Comparative sequencing of DNA/RNA among organisms Molecular clocks BioEd Online

BioEd Online Taxonomic Diagrams MammalsTurtlesLizards and Snakes CrocodilesBirdsMammalsTurtlesLizards and Snakes CrocodilesBirds CladogramPhylogenetic Tree BioEd Online

BioEd Online Dichotomous Keys Identify Organisms Dichotomous keys versus evolutionary classification Dichotomous keys contain pairs of contrasting descriptions. After each description, the key directs the user to another pair of descriptions or identifies the organism. Example: 1.a) Is the leaf simple? Go to 2 b) Is the leaf compound? Go to 3 2.a) Are margins of the leaf jagged? Go to 4 b) Are margins of the leaf smooth? Go to 5 BioEd Online

BioEd Online Thank You This concludes a brief review of biological classification. You may find additional information on this section of in the expanded content talks and in the notes below each slide in the slide library. BioEd Online

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