Biology Revision 2

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Across
  1. 4. the movement of particles across a cell membrane from a region of lower concentration to a region of higher concentration against the concentration gradient
  2. 8. Anything that transfers material from one organism to another
  3. 10. a group of plant hormones that affect the growth and elongations of cells
  4. 12. and unspecialised cell
  5. 13. A microorganism that causes a communicable disease
  6. 15. a communicable disease caused by a bacterium, which causes extreme diarrhoea
  7. 16. a protein produced by lymphocytes
  8. 17. unaffected or less affected by something
  9. 18. an enzyme produced in tears
Down
  1. 1. a small mesh tube used to widen narrowed blood vessels
  2. 2. a particle that can infect other cells
  3. 3. when people choose organisms with certain characteristics and use only those ones for breeding
  4. 5. an enzyme that cuts DNA molecules into pieces
  5. 6. uncontrolled cell division
  6. 7. a hormone that is involved in the ripening of fruit
  7. 9. a type of reaction that takes place in all living cells
  8. 10. medicine that helps people recover from a bacterial infection
  9. 11. a change in one or more characteristics of a population over a long period of time
  10. 14. cells cells that open and close plant stomata