Across
- 2. Living things come from other living things.
- 4. Structures that are not used in an organism.
- 6. The genetic contribution an individual has to the next generation.
- 7. The belief that living things come from nonliving things.
- 9. Structures that come from different ancestors but serve the same function.
- 10. The development of new types of organisms from preexisting organisms over time.
- 12. Layers of rock.
- 13. The study of the locations of organisms around the world.
Down
- 1. Structures that come from the same ancestor, but serve different functions.
- 3. Natural forces that act on a species, causing it to change over time.
- 5. A trait that makes an individual more successful in its environment.
- 8. A species that has features of the ancestor and later species- the intermediate species.
- 11. The remains or traces of organisms that died long ago.