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Classifying Organisms

Classifying Organisms. 4/11/12. Classification – the process of grouping things based on their similarities. . Why Classify?. Biologist use classification to organize living things into groups so that the organisms are easier to study.

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Classifying Organisms

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  1. Classifying Organisms 4/11/12

  2. Classification – the process of grouping things based on their similarities.

  3. Why Classify? • Biologist use classification to organize living things into groups so that the organisms are easier to study.

  4. Taxonomy – the scientific study of how living things are classified.

  5. Early Systems of Classification • Aristotle put animals into three groups: • Those that fly • Those that swim • Those that walk, crawl, or run

  6. Classification of Linnaeus • Linnaeus’s naming system to classify organisms was called binomial nomenclature. 2 part names: genus and species.

  7. Early Systems of Classification • Genus – classification grouping that contains similar, closely related organisms. • Ex. Pumas, ocelots, and house cats are all classified in the genus Felis.

  8. Species – group of similar organisms that can mate and reproduce fertile offspring in nature. • Ex. Pumas and mountain lions have the name Felis concolor meaning the same color.

  9. Today biologists have organized organisms into 7 levels: Kingdom Phylum Class Order Family Genus Species King Phillip Came Over For Good Spaghetti 7 Levels of Classification Today

  10. Taxonomy Key • Taxonomy key– series of paired statements that describe the physical characteristics of different organisms.

  11. Evolution and Classification • Evolution – change over time. • Charles Darwin (1859) – He had the idea that finches from South America flew to some islands nearby and began to change over time.

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