Across
- 3. what turns ammonia into nitrates
- 7. one benefits and one is unharmed
- 9. one animal stalks kills and
- 10. both benefit
Down
- 1. takes nitrates and puts it in the air as nitrigen gas
- 2. what turns nitrogen into the air into usable nitrogen
- 4. how animals get their carbon
- 5. both are harmed
- 6. organism that can produce its own needs
- 8. organism that eats other organism for nutrients