Evolution

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Across
  1. 7. is best suited for their environment survive and reproduce
  2. 9. changes over time
  3. 10. individual's ability to reproduce and survive
  4. 11. formation of new species
Down
  1. 1. number and relative abundance of various species
  2. 2. evolutionary history of a species
  3. 3. body parts that have different mature forms
  4. 4. differences in characteristics among individual species
  5. 5. of any inherited trait makes an organism
  6. 6. physically similar structures
  7. 8. homologous organs that are no longer used