biology

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Across
  1. 4. supports cell and allows substance to move in and out
  2. 6. particles moving, high contration to low concentration
  3. 8. the nucleolus disappears, envelope breakdown
  4. 9. petects sound vibrations
  5. 10. send messages and coordinate activity of the body
  6. 13. two parents can produce
  7. 15. only one parent can produce
Down
  1. 1. large stepage pack
  2. 2. two new nuclear evelopes form
  3. 3. is the major organ of the human
  4. 5. deliver oxyen to cells
  5. 7. sister chromatids separate into individual chromosomes
  6. 11. produces improtant protein molecules
  7. 12. protects and supports the cell membrane
  8. 14. mitosis is the division of