Question 21
Question 21 of 40
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Older MCQs might not have the typical A, B, C, D choices. They have choices 1, 2, 3, and a combination of them is the answer. Below is the key that maps such combinations to the answer.
A 1, 2 and 3 are correct
B 1 and 2 only are correct
C 2 and 3 only are correct
D 1 only is correct
Topics Tested
10. Diseases and immunity
10.1. Diseases and immunity

Describe active immunity as defence against a pathogen by antibody production in the body

9. Transport in animals
9.4. Blood

State the functions of: (a) lymphocytes – antibody production (b) phagocytes – engulfing pathogens by phagocytosis