Across
- 2. structures that have no apparent function
- 3. survival and reproduction
- 6. a change in a living organism
- 8. having the same structure
- 10. organism adjusted to their environment
- 11. organism adjust to new environment
- 12. separation of species by physical barriers like water forms, oceans, mo
- 13. development is marked by isolation
- 15. remains of plants of animals
Down
- 1. variety of life on earth
- 4. beginning or existence
- 5. medium sized bird
- 7. energy released in the form of particle
- 9. a group of species separate from others
- 14. a thought out explanation