Across
- 2. – Tiny single-celled organisms, some cause diseases while others are useful.
- 4. – A milk product made by bacterial fermentation.
- 6. – The smallest germ that can only live and multiply inside living cells.
- 8. – A chemical used to kill harmful insects on crops.
- 9. – Fuel made from decayed animal and plant waste.
- 11. – A substance that protects the body from diseases.
- 12. – The process by which microorganisms produce energy without oxygen; used in making bread and yogurt.
Down
- 1. – Decayed organic matter used as fertilizer.
- 3. – Medicine used to kill or stop harmful bacteria.
- 5. – Organisms such as molds and mushrooms that feed on dead matter.
- 7. – The breaking down of dead plants and animals into simpler substances.
- 10. – A microorganism that causes disease.