Across
- 1. natural process by which something takes place
- 3. the ship darwin sailed on
- 5. educated guess
- 7. old bones from preserved remains
- 9. struggle among living things
- 10. how organisms changed over many years
Down
- 2. inherited trait used for survival
- 4. group of similar organisms
- 6. a theory that is usually true
- 8. father of evolution