Across
- 3. foundation of life on earth
- 4. result of living things
- 8. Selection living organisms adapt and change
- 9. relationship between indivduals
- 11. regions of the surface
- 13. community of interacting organisms
- 15. derived from living organism
- 16. living things and interactions
- 18. consists of all food chains
Down
- 1. key identify different organisms
- 2. organisms that feed on other organisms
- 5. boosts the economy
- 6. relationships between two living species
- 7. increasing of resources
- 10. symbiotic relationship
- 12. Succession previously occupied area
- 14. Succession plants and animals first colonize
- 17. relations of organisms