Across
- 5. Controls the activities of the cell
- 8. Fully permeable structure supporting plant
- 9. Site of photosynthesis in plant cells
- 11. root hair cells have a long and __________ extension
- 12. muscle cells have a lot of these
- 13. exit
Down
- 1. adaptation of red blood cells that allow it to squeeze through blood vessels
- 2. Gas transported by red blood cells
- 3. Jelly-like substance where reactions occur
- 4. Organelle that synthesises proteins
- 6. Partially permeable structure controlling entry
- 7. red blood cells are circular and ____________
- 8. Basic units of all living things
- 10. Process by which cells become specialised