Across
- 4. the process by which different kinds of living organisms are thought to have developed
- 6. the process whereby organisms better adapted to their environment tend to survive
- 9. organ or body part that appears in different animals
- 10. a change or difference
Down
- 1. an organism's ability to survive and reproduce in a particular environment.
- 2. similar or corresponding functions but not from the same evolutionary origin.
- 3. anatomical feature or behavior that no longer seems to have a purpose in the current form of an organism
- 5. change by which an organism or species becomes better suited to its environment.
- 7. the remains or impression of a prehistoric organism preserved in petrified form or as a mold or cast in rock.
- 8. identification by humans of desirable traits in plants and animals