Which of the following pairs is mismatched?
a. innate immunity: highly specialized defenses.
b. secondary immune response: immunological memory.
c. hematopoiesis: bone marrow.
d. phagocytosis: uptake and killing of microbes.
e. lymphocyte recirculation: continuous transport between blood and lymph.

innate immunity : highly specialized defenses.

Explanation:

Immunity against infectious diseases are 2 types - innate immunity and acquired immunity. Innate immunity is the type of defense mechanism which is present at birth. This type of immunity does not depend upon the immunization. This type of immunity is not highly specific as acquired immunity. Innate immunity has no memory and response in first-rate towards the antigens. The phagocytic cells, dendritic cells are some cells of the innate immune system. This changes throughout the lifetime. Different species have different innate immunity. It means different species show different susceptibility to different diseases. e.g Rats are unsusceptible to Diphtheria while men, guinea pigs are highly susceptible to Diptheria.

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