Changes Over Time

2. Darwin's ship
4. type of bird Darwin made important observations about during his travels
6. The man credited with coming up with the theory of evolution
9. the idea that more organisms are produced than can possibly survive into adulthood
10. a group of similar organisms that can mate with each other and produce fertile offspring
11. scientists may compare the DNA or the order of ___________________ to show common ancestry
14. any difference between individuals of the same species
16. the process of change over time
17. the pattern in which species evolve during short periods of rapid change and then do not change much
18. the process by which individuals that are better adapted to their environment are more likely to survive and reproduce.
19. the preserved remains or traces of an organism that lived in the past

1. the type of rock that fossils are often found in
3. location Darwin visited to help him come up with the theory of evolution.
5. a well-tested concept that explains a wide range of observations
7. similar structures that related species have inherited from a common ancestor
8. scientists can use this to infer the structures of ancient organisms
12. one of the factors that affect natural selection...organisms will fight over resources.
13. a trait that increases an organism's ability to survive and reproduce.
15. involves small changes that add up to major changes over time