Across
- 6. a chain where animals eat each other
- 9. able to form nutritional organic substances
- 10. only eat meat
- 12. a green pigment present in green plants
- 13. a system of interlocking and interdependent food chains.
Down
- 1. an organism deriving its nutritional requirements from complex organic substances.
- 2. the action of breathin
- 3. only eat plants
- 4. an organelle found in large numbers in many cells.
- 5. a plastid that contains chlorophyll and in which photosynthesis takes place.
- 7. the process plants do
- 8. eat both meat and plants
- 11. the source of energy for use and storage at the cellular level