Across
- 2. Single-celled organisms
- 4. its original form during
- 10. suitable for growth.
- 11. live in nearly every environment
- 13. The mass of a substance per
Down
- 1. or evolution.
- 3. plant or animal matter.
- 5. material: Substances
- 6. To transform a structure
- 7. To maintain bacteria in a
- 8. To change from one form to
- 9. An organism that is
- 12. Earth.