Across
- 4. first step of protein synthesis
- 5. short energy
- 8. system with oxygen
- 12. system that protects against disease
- 14. system that secrets hormones
- 15. second step of protein synthesis
- 18. filters blood
- 19. acids store and transmit genetic information
- 20. part of a flower
Down
- 1. system with blood
- 2. two alleles
- 3. long energy
- 6. system with organs and glands
- 7. process that changes a population
- 9. system with smooth tissue
- 10. maintain balance
- 11. system known as skin
- 13. system transmits impulses
- 16. system with bones
- 17. structures and functions of cells