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Cladistics: Evolutionary Relationships of Organisms

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  1. CLADOGRAMS

  2. CLADISTICS • Amethod of classification of animals and plants according to the number of characteristics that they have in common. • It is assumed that the greater the number of characteristics that two organisms share, the more recently they diverged from a common ancestor.

  3. CLADOGRAM • Abranching diagram showing the evolutionary relationship between a number of species.

  4. Which organisms have hair? • Which organisms have jaws? • Which organisms have jaws, four walking legs, and amniotic eggs?

  5. Which organisms have vertebrae? • Which organisms have four limbs? • Which organisms are most closely related?

  6. Which of the following is NOT a characteristic of mice? • Backbone • Lungs • Fur • Opposable thumb

  7. Which organisms are most closely related? • Fish and lizards • Salamanders and mice • Humans and chimpanzees • Humans and fish

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