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Across
  1. 3. nature
  2. 8. survive
  3. 10. made of genes
  4. 11. stores
  5. 12. birth
Down
  1. 1. structure
  2. 2. best
  3. 4. same
  4. 5. by itself
  5. 6. traits
  6. 7. different
  7. 9. humans