Question

multiple choice question
in biology, a _______ is something that moves an infectious agent from one organism to another, like an insect.
○ parasite
○ vector
○ plasmid

Explanation:

• A parasite lives on/in a host and harms it, but does not primarily function to transfer infectious agents between organisms.
• A vector is defined as an organism (like an insect) that carries and transmits an infectious agent from one organism to another, matching the description.
• A plasmid is a small DNA molecule in bacteria, unrelated to transferring infectious agents between larger organisms.

Answer:

B. vector