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7.Human Health and Disease
easy
Humans have acquired immune system that produces antibodies to neutralize pathogens. Still innate immune system is present at the time of birth because it
A
is very specific and uses different macrophages.
B
produces memory cells for mounting fast secondary response.
C
has natural killer cells which can phagocytose and destroy microbes
D
provides passive immunity
(NEET-2019)
Solution
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Standard 12
Biology
