Across
- 3. Cells with a nucleus
- 8. Darwin's theory of evolution
- 10. Different versions of a gene
- 11. Sticky substance found in airways
- 12. Changes in an organism over a long time
- 15. When an enzyme no longer functions
- 16. Found on the outside of lymphocytes
- 18. Coiled up DNA
- 20. _______ sheath, speeds up nerve impulses
- 22. Types of cell used for reproduction
- 23. All of an organisms DNA
- 25. Used to widen blocked arteries
Down
- 1. Connection between nerve cells
- 2. Shape of a DNA molecule
- 4. Movement across a semi permeable membrane
- 5. Type of cell that can become specialised
- 6. Type of drug than can kill bacteria
- 7. Harmful microbe
- 8. Chemical that transmits signals between neurones.
- 9. Cells with two sets of chromosomes
- 13. Diseases that can be passed on
- 14. Cell division creating 4 daughter cells
- 17. Cell ______, controls what goes into and out of cells
- 19. A biological catalyst
- 21. Cell division creating 2 daughter cells
- 24. Accidental changes to a gene