Across
- 4. Close relationship between species
- 6. Fighting for the same resource
- 9. Able to form nutritional organic substances
- 10. Organic compounds by bacteria
- 12. Act of leaving
- 15. Highest rank or importance
- 16. An organism that cannot make its own food
- 18. Microscopic ocean plants that do photosynthesis
- 19. Something an organism needs to survive
- 20. Organism living off a host
Down
- 1. Relationship where both species benefit
- 2. Environment of an organism
- 3. One benefits, other unaffected
- 5. Dead organic matter that decomposers feed on
- 7. An organisms role in its environment
- 8. Process by which plants make food using sunlight
- 11. Organism that gets its food by eating other organisms
- 13. To live permanently in a foreign country
- 14. Ability of an organism to survive under a range on conditions
- 17. Makes complex organic compounds