Changes Over Time

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Across
  1. 2. Darwin's ship
  2. 4. type of bird Darwin made important observations about during his travels
  3. 6. The man credited with coming up with the theory of evolution
  4. 9. the idea that more organisms are produced than can possibly survive into adulthood
  5. 10. a group of similar organisms that can mate with each other and produce fertile offspring
  6. 11. scientists may compare the DNA or the order of ___________________ to show common ancestry
  7. 14. any difference between individuals of the same species
  8. 16. the process of change over time
  9. 17. the pattern in which species evolve during short periods of rapid change and then do not change much
  10. 18. the process by which individuals that are better adapted to their environment are more likely to survive and reproduce.
  11. 19. the preserved remains or traces of an organism that lived in the past
Down
  1. 1. the type of rock that fossils are often found in
  2. 3. location Darwin visited to help him come up with the theory of evolution.
  3. 5. a well-tested concept that explains a wide range of observations
  4. 7. similar structures that related species have inherited from a common ancestor
  5. 8. scientists can use this to infer the structures of ancient organisms
  6. 12. one of the factors that affect natural selection...organisms will fight over resources.
  7. 13. a trait that increases an organism's ability to survive and reproduce.
  8. 15. involves small changes that add up to major changes over time