Across
- 1. organisms living together causing one to benefit
- 4. molecules containing carbon
- 5. animals killing another animal for food
- 7. helps prevent the buildup of harmful nitrogen compounds, thus reducing the risk of water contamination and fish health problems.
- 10. both organisms benefit
Down
- 2. one benefits but it doesn't harm the other
- 3. two or more organisms fighting for resources
- 6. one benefits one is harmed
- 8. microorganisms whose action results in the conversion of nitrates in soil to free atmospheric nitrogen
- 9. plants and animals decompose and return to soil