Answer: IgA.
- A IgG
- B IgA
- C IgM
- D IgE
Correct answer: B. IgA
Explanation: Colostrum is rich in IgA antibodies, which provide passive immunity to the infant. This is an example of natural passive immunity.
The Plasmodium parasite needs both hosts: the female Anopheles mosquito injects sporozoites while biting (infecting the human liver and RBCs, causing the malaria fever cycle), then picks up gametocytes from an infected person's blood, completing the parasite's sexual stage inside the mosquito.
Concept context
Pathogens, infectious diseases, non-infectious diseases, drugs, cancer, and public health. High NEET importance.