Answer: B-lymphocytes.
- A B-lymphocytes
- B red blood cells
- C blood platelets
- D nerve cells
Correct answer: A. B-lymphocytes
Explanation: B-lymphocytes secrete antibodies against antigens.
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.