Chapter 3 Test

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