Across
- 4. association to benefit both organisms
- 6. identifies different organisms based on traits
- 9. living as a parasite
- 10. sterile
- 12. something that eats or uses something
- 15. all living things in a certain area
- 16. species that invade a location
- 17. pollution that points to a source
- 19. region occupied by living organisms
- 20. something that makes or causes something
Down
- 1. environment for an organisms
- 2. when a new patch of land is exposed
- 3. climax community is impacted by a disturbance
- 5. a social group that shares something in common
- 7. something that relies on something
- 8. survival of the fittest
- 11. living organism that shapes its environment
- 13. relations of organisms to one another
- 14. gas surrounding earth
- 18. a system of interlocking food chains