Across
- 3. to make an exact copy
- 5. respiration happens here
- 8. red blood cells do not have one of these
- 10. when a cell divides to produce two identical copies they are called this
- 11. how many times bigger?
- 13. are made of DNA
- 14. happens in the chloroplasts
- 15. a sperm cell has one of these
- 16. white blood cells produce these
- 18. we use this to look at very small things
- 19. these cells contract
Down
- 1. cells without a nucleus
- 2. a web of fibres in cell division
- 4. plant cells have these in the centre
- 5. the layer on the outside of all cells
- 6. cell division of eukaryotic cells
- 7. a small ring of DNA found in bacteria
- 9. the cytoplasm divides and new cell membranes form
- 12. protein synthesis happens here
- 16. these cells do not have a cell wall
- 17. these reproduce by binary fission