Natural selection

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Across
  1. 4. get used to
  2. 7. word for variety
  3. 9. Educated guess
  4. 11. of Evolution
  5. 12. Animal category
Down
  1. 1. Traits belonging to
  2. 2. Last name of charles
  3. 3. Hidden
  4. 5. Molding
  5. 6. bird
  6. 8. Favoring
  7. 10. change overtime