Darwin's Theory Of Evolution

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Across
  1. 4. natural selection is ____ of the fittest
  2. 5. any version of a trait that increases chances of survival
  3. 7. individuals best suited for their environments will survive and reproduce
  4. 8. preserved remains of ancient organisms
  5. 10. Darwin was always fascinated by biological ____
  6. 11. Thomas ____ was a British economist that studied the limitations of human population growth
  7. 13. An organism must ____ for its traits to be passed on
  8. 15. the ship on which Darwin sailed
  9. 17. the islands on which Darwin observed tortoises and finches
Down
  1. 1. Alfred ___ observed similar patterns to Darwin in Indonesia
  2. 2. Jean-Baptiste ____ believed that organisms change during life and pass on those acquired traits
  3. 3. ____ selection is when humans breed plants and animals for desireable traits
  4. 6. in order for natural selection to occur, there must be ___ between individuals
  5. 9. a measure of an organism's chance of surviving and reproducing
  6. 12. the study of rocks, fossils and the age of the Earth
  7. 14. a species that no longer exists in nature is ____
  8. 16. change of organisms over time