Across
- 3. energy required
- 5. infectious particles
- 6. high to low
- 8. protective protein
- 9. Nucleus disappears
- 10. made of dense fibers
- 13. Brain of cell
- 14. a liquid is brought
- 15. cancerous tumors
Down
- 1. solid particles
- 2. line up in center
- 4. no energy required
- 7. membrane protective covering
- 8. living environment
- 11. non- life threatening
- 12. material outside cell