Staying alive

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Across
  1. 1. the semipermeable membrane
  2. 3. action or process of copying something
  3. 6. the increase in number or spread of organisms
  4. 7. the material or protoplasm within a living cell
  5. 9. something that can move forward or backwards
  6. 12. Movement, Respiration, Sensitivity, growth
  7. 14. active against microbes
  8. 16. process of eliminating or expelling waste matter
  9. 17. a space or vesicle within the cytoplasm of a cell
Down
  1. 2. an instrument used for viewing very small objects
  2. 4. the smallest structural and functional unit
  3. 5. a plastid in green plant cells
  4. 8. a microorganism, especially bacterium
  5. 10. feelings to be offend or hurt
  6. 11. process of providing or obtaining food
  7. 13. a rigid layer of polysaccharides
  8. 15. the central and most important part of an object