Dichotomous

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Across
  1. 3. similar characteristics
  2. 4. pairs
  3. 6. periodic table
  4. 7. Animal or plant
  5. 9. steps
  6. 10. Instructions
Down
  1. 1. what you learn in school
  2. 2. Its the title
  3. 5. offspring
  4. 8. Science of naming a classifying organisms based on characteristics