Adaptive immunity basics

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Across
  1. 2. the cell-based division of the adaptive immune system
  2. 5. adaptive immunity operates on a principle called _________ selection: picking the exact one cell for the job and having that cell made into many
  3. 7. protective protein molecule produced by the adaptive immune system
  4. 8. adaptive immunity has _______ component; exposure to pathogen gives immunity next time
Down
  1. 1. not present at birth but obtained
  2. 3. another way the adaptive immune system is named means exact and detailed in nature
  3. 4. the liquid or fluid-based division of the adaptive immune system
  4. 6. what the adaptive immune system responds to