Which of the Following Types of Microbe was NOT Observed

Question

Which of the following types of microbe was NOT observed by Leeuwenhoek?
A) fungus
B) protozoan
C) prokaryote
D) alga
E) virus

Accepted Answer

Leeuwenhoek did not have the technology to observe viruses, as they are much smaller than other microbes and cannot be seen with a simple microscope.