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Which one of the following immune system components does not correctly match with its respective role?
The lobed organ located near the heart and beneath the breast bone in humans is :
Assertion (A) : Lymphocytes arise from bone marrow and present in the blood and lymph and serve as natural killer cells. Reason (R) : Lymphocytes migrate to thymus, where they develop into T-cells and begin to mature.
Give an account of the generalised structure of an antibody molecule produced by B-lymphocytes in response to the pathogen.
Other than public awareness and counselling, enlist four measures taken up by NACO, WHO and other NGOs to prevent the spread of HIV infection in the society.
Explain why the milk produced by the mother during the initial days of lactation is considered to be very essential for the newborn infant.
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