Evolution and Natural Selection

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Across
  1. 2. argued new species come into existence through acquired traits not natural selection
  2. 4. speciation that occurs through physical seperation
  3. 8. populaations that develop slight differences due to rare gene flow
  4. 10. anatomical similarities resulting from common ancestory
  5. 11. migrated nostrils in whales
  6. 13. earliest true whale from Pakistan
  7. 14. argued for evolution through natural selection
  8. 15. speciation that occurs through the exploitation of a new niche
  9. 17. a type of fossil that shows how one species evolved into a new species
  10. 18. island inhabitants whose beaks varied
  11. 20. structures that no longer have a purpose
Down
  1. 1. home to Darwins finches
  2. 3. fish feature that develops in human embryos then dissappears
  3. 5. argued in his book that the earth is very old
  4. 6. link between dinosaurs and birds
  5. 7. Darwins ship
  6. 9. mouse that evolved a dark fur color and now can live in lava rock
  7. 12. ability to survive and reproduce
  8. 16. african fish that speciated due to geographic isolation
  9. 19. warned that overpopulation and a lack of food would lead to mass starvation