Across
- 4. levels hierarchical of the food web
- 7. carbon dioxide organism
- 10. single-celled photosynthetic bacteria
- 11. community of organisms
- 12. a substance separate from solution
Down
- 1. a change from liquid to vapor
- 2. cause by living organisms
- 3. plant eating animal
- 5. grows agricultural products
- 6. amount of living matter
- 8. act of keeping busy
- 9. ecological community