Across
- 2. a way to view a complex system of consumers and producer
- 3. a species that breaks down other speices
- 4. the first link in the food chain
- 7. a variety of species in a given area
- 8. species fight for resources
- 10. result of nitrogen being turned into a usable form
- 11. a place where is found and cycled through
- 12. the third link in the food chain
Down
- 1. two species that coexist together
- 5. a relationship where both species benefit
- 6. when plants use nitrates
- 9. critical element in amino acids