Across
- 3. soil contains certain bacteria called -------
- 4. is necessary for photosynthesis
- 5. is known as auto
- 7. the leaf's colour turn blue-black in testing for -------
- 8. is synthesized during photosynthesis
- 9. the process of taking in food by an organism and its utilization by the body is called ____
Down
- 1. ------ is required to grow
- 2. the rate of --------- is affected by light
- 6. is known as feeding