Darwin's theory of Natural Selection

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Across
  1. 5. too much offspring
  2. 8. the improvement of a species
  3. 9. a trait that gives advantage
Down
  1. 1. the answer to questions about genetics
  2. 2. change in species
  3. 3. Darwin's boat
  4. 4. ancestor all species have this (2 words)
  5. 6. Darwins profession
  6. 7. islands Where he discovered the finch (2 words)
  7. 10. selection this theory can be summarized in four steps (2 words)