Evolution Crossword Puzzle

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Across
  1. 6. "survival of the fittest"
  2. 9. similar structure in different species of same lineage
  3. 10. heritable characteristics that increase an organism's fitness
Down
  1. 1. ability to survive and reproduce
  2. 2. selective breeding of organisms for specific traits
  3. 3. structure that has lost its function
  4. 4. similar structure/function from different lineage
  5. 5. study of distribution of organisms in their environment
  6. 7. genetic change in populations over time
  7. 8. preserved remains of ancient organisms