Across
- 5. name an organism that live in/or other living organisms and derive food from them
- 6. what are the tiny structures in plant cells where photosynthesis happens
- 8. the mode of nutrition where two different organisms work together for their mutual benefit
- 9. algae is an _________.
- 10. The ultimate source of energy.
Down
- 1. gas used for photosynthesis
- 2. the process by which cells use oxygen to break down sugar and obtain energy
- 3. farmers add this to improve the growth of the plant.
- 4. The green pigment needed for photosynthesis.
- 7. The only organism which can trap nitrogen.