Across
- 4. Any living thing
- 6. The natural home of an organism
- 7. web A network of connected food chains
- 9. Organism that makes its own food
- 10. A community of living and nonliving things interacting
- 13. Organelle where photosynthesis takes place
- 15. A trait that helps an organism survive
- 16. A group of the same species living in one area
- 17. Close relationship between two species
- 18. respiration Process cells use to release energy from food
Down
- 1. chain A sequence showing how energy moves through organisms
- 2. Process plants use to make food using sunlight
- 3. Variety of living things in an area
- 5. Organelle known as the powerhouse of the cell
- 8. The control center of the cell that contains DNA
- 11. Organism that breaks down dead matter
- 12. Organism that eats other organisms
- 14. The basic unit of structure and function in living things