Across
- 2. Water and nutrient up plant
- 4. Sugar down plant
- 5. Structures in a cell
- 7. Stable equilibrium
- 9. Organs and tissues working together
- 11. Sugar
- 13. Food into energy
- 16. Plant food
- 17. Exhalation of water
- 19. One species
- 20. Causes a reaction
- 21. Compound found in living things
Down
- 1. Positive or negative
- 3. Fats
- 6. Organisms and environment
- 8. Individual, living system
- 10. Amino acids
- 12. Substance as a result of a reaction
- 14. Interacting species
- 15. Substance altered by chem. reaction
- 18. DNA