Question

quiz question index
a pathogen is:
possible answers:
a) a contaminant
b) a disease - causing microorganism
c) bacteria used to make yogurt
d) a type of parasite

Explanation:

A pathogen is defined as an organism that causes disease. Option B directly states this definition. Option A is incorrect as a contaminant is a general term for something that makes something else impure. Option C refers to beneficial bacteria used in food production, not pathogens. Option D is too narrow as pathogens include more than just parasites (like viruses, bacteria, fungi etc.).

Answer:

B. A disease - causing microorganism