Theory of Evolution

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Across
  1. 6. the process of mutating
  2. 7. develop gradually
  3. 10. better adapted to their environment
  4. 12. a group of living organisms
Down
  1. 1. hide or disguise
  2. 2. a change or difference in condition
  3. 3. receive money as a heir
  4. 4. all species gradually change over time.
  5. 5. British naturalist
  6. 8. action of adapting
  7. 9. A French naturalist.
  8. 11. A supposition that explains something.