Across
- 4. trait passed down through generations because organisms lived better
- 6. no longer in existence
- 8. remains of dead organisms preserved in rock or as a mold
- 9. being able to imitate or act like an organism
- 10. formation of new and distinct species in the course of evolution
Down
- 1. came up with the theory of evolution by natural selection
- 2. organ that is in an organism but is not useful but was useful for ancestors
- 3. animal that helped prove natural selection because darker color helped blend in
- 5. a trait that is formed to help animals survive because of their environment
- 7. animals evolving over time
- 11. being able to blend in to your surroundings
- 12. an organism's relative that has been dead for a while