Across
- 2. Organic polymer composed of amino acids
- 5. Substance that is changed by a chemical reaction
- 6. Biological catalyst that helps reactions occur in organisms
- 7. Substance formed by a chemical reaction
- 8. Substance that increases the reaction rate of a chemical reaction
- 9. Building blocks of proteins
Down
- 1. The ability to maintain a stable internal environment
- 3. Unused or excess material produced by organisms or systems
- 4. Materials or energy that enter a system
- 10. Materials or energy that exit a system