Figure 17.1 -In Figure 17.1, the Arrow at Time D Indicates

question 26

Multiple Choice

Figure 17.1

-In Figure 17.1, the arrow at time d indicates

• A) The secondary response.
• B) The time of exposure to the same antigen as at time a.
• C) Exposure to a new antigen.
• D) The primary response.
• E) None of the above.

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