natural selection

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Across
  1. 3. a process in which an organism is born
  2. 6. getting used to \ adapta-
  3. 8. material that all living organisms have
  4. 9. living or existing
  5. 10. carefully choosing
Down
  1. 1. not made by humans
  2. 2. evolving
  3. 4. count of something
  4. 5. changing of a gene\ muta-
  5. 7. a living thing