Evolution

2. Changes in the earth's crust during geological history have resulted from the action of continuous and uniform processes.
5. All the organisms of the same group or species, which live in a particular geographical area.
8. Slow changes over long periods of time….this term is still used today in the changes of organisms through evolution.
10. The process by which humans choose traits through breeding.
11. Remnants of organs or structures that had a function in an early ancestor.
13. Structures that are similar in origin but appear in different organisms and have different functions.
14. Natural disasters shaped land forms and caused species to become extinct.
17. The study of the distribution of organisms around the world.
18. The change in organisms over time.

1. An inherited trait that allows an organism to better survive in its environment.
3. Any evidence of a once living thing.
4. The process whereby organisms better adapted to their environment tend to survive and produce more offspring.
6. A measure of the ability to survive and produce more offspring relative to other members of the population in a given environment.
7. The differences in physical traits within a species.
9. Structures that perform a similar function but are not similar in origin.
12. The ability of a trait to be passed down.
15. The study of fossils or extinct organisms.
16. A group of organisms which in nature can interbreed and produce fertile offspring.