Science vocab crossword

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Across
  1. 3. biology that deals with how plants and animals are distributed
  2. 4. random change in genes
  3. 7. structure that has lost its function, now just artifacts of the past
  4. 8. mechanism of evolution, used to remove unfit organisms from gene pool
  5. 11. ancestor that two species have in common
  6. 14. a change that is made to suit the environment
  7. 16. similarities in genetic structure and cell structure between organisms indicating shared ancestory
  8. 18. all extreme phenotype is favored over a intermediate
  9. 19. how well an organism is suited to its environment
  10. 20. slow change with occasional rapid change
Down
  1. 1. structures that serve a similar purpose, but evolved separately
  2. 2. one extreme phenotype is favored over all others
  3. 5. Similar structures from common ancestors, but serving different functions
  4. 6. something happens that doesn't let many of a species survive and with decreased genetic variation, leading to extinction
  5. 9. gradual change in a species
  6. 10. species becoming too different from each other to interbreed, creating a new species
  7. 12. transfer of genetic materials from one population to another
  8. 13. one non-extreme trait is stabilized to
  9. 15. change in traits
  10. 17. species genes become different leading to speciation