Across
- 2. carbon dioxide is this
- 4. a type of protein
- 5. the diffusion of water
- 6. the control center
- 7. when molecules move
- 8. non living organism
- 10. the relationship between cells
- 11. some substances can pass through the membrane
- 16. carry out specific functions
- 17. a group of similar cells
Down
- 1. energy rich organic compounds
- 2. an organic compound
- 3. gives cells there shape
- 8. a rigid layer of non living material
- 9. single celled organism
- 10. formes the outside boundary
- 12. oxygen and nitrogen are examples
- 13. dissolved materials
- 14. organs composed of many cells
- 15. the movement of materials through a cell