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    Biology
  3. Study Set
    Human Biology Study Set 6
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    Exam 9: Immunity and Disease
  5. Question
    The First Line of Defense Against Foreign Invaders Is ____
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The First Line of Defense Against Foreign Invaders Is ____

Question 21

Question 21

Multiple Choice

The first line of defense against foreign invaders is ____.


A) adaptive immunity
B) the immune system
C) B and T cell activity
D) physical and chemical barriers
E) antibody production

Correct Answer:

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