Science

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Across
  1. 3. reproduction: one
  2. 5. diversity: variation
  3. 8. selection: Purebred
  4. 9. reproduction: two
  5. 10. change
  6. 12. instructions
Down
  1. 1. adaptation: hormones
  2. 2. selection: natural
  3. 4. dna
  4. 6. genes
  5. 7. adaptation: physical
  6. 11. chromosomes