Ch30

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Across
  1. 3. Darwin
  2. 6. pressure
  3. 8. survival
  4. 9. evolution
  5. 10. reproduction
  6. 11. natural-selection
Down
  1. 1. ancestor
  2. 2. generation
  3. 4. adaptation
  4. 5. variation
  5. 7. favourable