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CLASSIFICATION

CLASSIFICATION. What i s Classification ?. c lassification - putting things into orderly groups based on similar physical characteristics taxonomy - the science of naming and classifying living things. The History of Classification. Aristotle ( B.C.)

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CLASSIFICATION

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  1. CLASSIFICATION

  2. What is Classification? • classification- putting things into orderly groups based on similar physical characteristics • taxonomy - the science of naming and classifying living things

  3. The History of Classification • Aristotle (B.C.) • the first to classify organisms • classified ALL organisms as either plant or animal • Grouped by physical characteristics: Example: hair or no hair

  4. The History of Classification CarolusLinnaeus(1700s) “Father of Taxonomy” Created a system of naming and grouping organisms based on similarities in structure Based names on Latin

  5. The History of ClassificationScientific Names Linnaeus ALSO gave us….. Binomial nomenclature: TWO word names Based on Latin and Greek First word is capitalized; second word is not Both words should be underlined or italicized Example: Felisdomesticus

  6. Modern Classification • Today, scientists use a system similar to Linnaeus’s system with 8 levels of classification based on common characteristics LevelsAcronymExample (Humans) Domain dancing Eukarya Kingdom kangaroosAnimalia PhylumpreferChordata ClasscandyMammalia Orderover Primate FamilyfancyHominididae GenusgreenHomo Speciesspaghettisapiens Scientific name: Homo sapiens (Genus + species)

  7. largest, least similar group smallest, most similar group

  8. Modern Classification • Based on evolutionary history: where did it come from and how has itchangedover time? • Scientists look at • Similarities in structures (Does it have skin or scales or fur or feathers?) • Similarities in hereditary information (DNA) • Similarities in development (Does this insect have a caterpillar stage like a butterfly?)

  9. MODERN CLASSIFICATION • every organism to the RIGHTof the characteristic has that characteristic • every organism to the LEFT of thecharacteristic DOES NOT have the characteristic • Organisms that • share more characteristics are more closely related Ability to purr Retractable claws Give birth to live young Hair and mammary glands

  10. MODERN CLASSIFICATION

  11. MODERN CLASSIFICATION: Plants

  12. THE END!!!

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