Across
- 3. returns nutrients to ecosystems
- 4. a type of speciation
- 6. connects to enzyme
- 8. cause of trisomy 21
- 10. lack a nucleus
- 12. a symbiotic relationship
- 17. plants do this on hot dry days
- 19. gene regulation in bacteria
- 20. splits polymers
Down
- 1. important signal in cell division
- 2. contains nitrogen atoms
- 3. high to low
- 5. organelle containing digestive enzymes
- 7. a level of the food chain
- 9. produces CO2 as glucose is oxidized
- 11. type of immune response
- 13. 2n
- 14. energy molecule
- 15. carbon compounds
- 16. protein produced by active B cells
- 18. electron carrier