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Classification of Living Things

Classification of Living Things. Why Classify?. Scientific Names are dependable and universally accepted !. Carolus Linnaeus – 1707-1778. Our system is based on his work. Heirarchical system – 7 levels. Seven Levels of Classification. 1. Kingdom 2. Phylum 3. Class 4. Order

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Classification of Living Things

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  1. Classification of Living Things

  2. Why Classify? Scientific Names are dependable and universally accepted!

  3. Carolus Linnaeus – 1707-1778 Our system is based on his work. Heirarchical system – 7 levels.

  4. Seven Levels of Classification 1. Kingdom 2. Phylum 3. Class 4. Order 5. Family 6. Genus 7. Species Most broad Most specific

  5. Naming Organisms Genus species Called Binomial Nomenclature! Examples: Homo sapiens – Human

  6. What characteristics are used? - Similar structures - Evolutionary relationships - “Derived characters” – new characteristics that are evolutionary innovations Derived characteristics are used in cladograms.

  7. Cladogram

  8. Comparative Anatomy Turtle Human Horse Bird Bat Seal

  9. Human Coccyx and Monkey Tail

  10. Molecular Biology

  11. Comparative Embryology CHICK HUMAN

  12. Dichotomous Keys • written set of choices that leads to the name of an organism • Used to indentify unknown organisms

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