The advent of the electron microscope allowed ________ to be viewed for the first time.
A)protozoa
B)bacteria
C)viruses
D)algae

Question

Quizplus · Accepted Answer

Viruses are the smallest of all microorganisms and were not visible with older microscopes such as light microscopes. The electron microscope allowed for their visualization for the first time. Protozoa, bacteria, and algae were visible with light microscopes before the invention of the electron microscope.

The Advent of the Electron Microscope Allowed ________ to Be