Question

select the correct answer.
when an antigen attacks the body, it activates adaptive immunity. this adaptive immunity produces a strong response when it encounters the same antigen for the second time. which feature of adaptive immunity is essential for this kind of response?
a. the ability to remember the antigen it encounters
b. the ability to distinguish between self and nonself antigens
c. the ability to produce nonspecific antibodies against the foreign antigen
d. the ability to secrete lysozymes against pathogenic antigens

Explanation:

Adaptive immunity's key feature for a stronger secondary response is immunological memory, which is the ability to remember the antigen from the first encounter. Option A matches this. Option B is self - non - self recognition (tolerance), not for memory. Option C: adaptive immunity produces specific, not nonspecific, antibodies. Option D: Lysozymes are part of innate immunity, not adaptive.

Answer:

A. the ability to remember the antigen it encounters