Biology Paper 1 - Keywords

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