Across
- 2. Group of tissues working together
- 4. Organisms that break down dead material
- 6. cycle, The cycle involving carbon in nature
- 8. system, Several organs working together
- 9. The process by which plants make food using sunlight
- 12. Conversion of oxygen and glucose into energy in cells
- 14. Group of cells working together
- 15. web, System of feeding relationships in an ecosystem
- 16. A small unit that makes up all living things
- 18. Group of organisms of the same species living in an area
- 19. Part of a cell that performs a specific function (plural)
- 20. A community of living things and their environment
Down
- 1. Variety of life in an ecosystem
- 3. A feature that helps an organism survive in its environment
- 5. The balance of internal conditions in the body
- 7. chain, The chain of organisms showing who eats whom
- 10. Place where an organism lives and interacts
- 11. An organism that makes its own food
- 13. An animal or plant that eats other organisms
- 17. The study of organisms and their environment