Question

Plasma from a sick mouse is filtered across a membrane that has a 200 nm pore size. If the filtrate is still infectious when injected into a healthy mouse, then the pathogen is most likely a(n):

-parasitic worm
-fungus
-virus
-bacterium
-archaean

Answer 1

Virus

Step-by-step explanation:

Viruses are usually sized 5 - 300 nanometers, while other organisms are much bigger (bacteria 0.5 to 5 micrometers).