Which characteristic distinguishes adaptive (acquired) immunity from innate immunity?
Answer and explanation
Correct answer: B. It generates antigen-specific immunological memory providing rapid protection upon re-exposure
Adaptive immunity is characterized by high antigen specificity and the generation of immunological memory cells (memory B and T cells) that confer long-lasting, rapid, and heightened responses upon subsequent exposures to the same pathogen. Innate immunity is immediate, non-specific, and lacks memory.
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