Across
- 1. study of relationships between organisms
- 6. natural reactions
- 9. makes their own food
- 10. non-living
- 11. one benefits and one is harmed
- 12. decomposes dead organisms
Down
- 2. eats other organisms
- 3. living
- 4. both benefit
- 5. a state of balance
- 7. one benefits, one is indifferent
- 8. how many organisms a habitat can hold