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Across
  1. 2. naturalselection
  2. 3. fitness
  3. 6. commondescent
  4. 8. lyell
  5. 9. evolution
  6. 13. traits
  7. 15. inherited
  8. 16. offspring
  9. 18. malthus
Down
  1. 1. adaptation
  2. 4. hutton
  3. 5. homologousstructure
  4. 7. beagle
  5. 10. lamarck
  6. 11. theory
  7. 12. darwin
  8. 14. mutation
  9. 17. fossil