Dichotomous Keys

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Across
  1. 2. selective breeding
  2. 5. science people
  3. 8. selection without human intervention
  4. 9. pair
  5. 10. changes in a species over a long period of time
Down
  1. 1. living thing
  2. 3. similar characteristics can also mate
  3. 4. too many
  4. 6. helps identify things
  5. 7. science of naming