Which of the following is an example of a microorganism in action as a disease vector?
A. Fungi decomposing dead plant material
B. Mosquito transmitting malaria
C. Bacteria causing food poisoning
D. Algae producing oxygen through photosynthesis
Correct Option: Answer is B
Mosquito transmitting malaria
Microorganisms: All options except D involve microorganisms (fungi, bacteria, protozoa in the case of malaria).
Disease vector: This refers to an organism that transmits a disease-causing agent from one host to another. Only the mosquito plays this role in the given options. Mosquitoes pick up malaria parasites while feeding on an infected person. These parasites then develop inside the mosquito and become infectious. When the mosquito feeds on another person, it transmits the