Biology - year 9

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Across
  1. 5. Chemicals produced by our white blood cells in response to antigens on bacteria or viruses.
  2. 6. An organism whose DNA floats free in its cell. No organelles. Includes bacteria.
  3. 7. Bacterial STD
  4. 9. Found on the surface of all cells. Proteins that identify the cells. Can trigger antibody production
  5. 11. Used to treat a bacterial infection. Has no effect on viruses
  6. 12. Hair-like projections from the cells that line the trachea and bronchi in the respiratory system.
  7. 13. Organisms with cells that have organelles such as a nucleus and mitochondria.
  8. 14. Movement of water molecules down a concentration gradient through a semi-permeable membrane
  9. 16. Unicellular microbes. Some are useful and some are harmful.
  10. 18. Made of dead or inactivated form of a pathogen that stimulates immunity in a person.
  11. 19. Movement of particles from a region of high concentration to a region of low concentration
Down
  1. 1. Process by which some white blood cells ingest pathogens
  2. 2. Malaria is caused by this type of organism
  3. 3. Sticky liquid that cells produce that catches dust and pathogens and is moved by cilia on the cells of the trachea and bronchi
  4. 4. Rose black spot is caused by this type of organism
  5. 6. Used to treat the symptoms of an illness.
  6. 8. A pill given in a trial that contains everything but the drug being tested
  7. 10. transport Movement of particles that requires energy from respiration.
  8. 15. Disease caused by a plasmodium and transmitted by a vector
  9. 17. HIV is caused by this type of pathogen