Question

multiple choice question
light microscopes can be used to observe all of the following except ______.

eukaryotic cells
bacterial cells
most viruses
archaeal cells

Explanation:

Light microscopes have a limited resolution (typically around 0.2 micrometers). Eukaryotic, bacterial, and archaeal cells are all large enough to be visualized with this type of microscope. However, most viruses are much smaller (usually 0.02-0.3 micrometers), so they cannot be observed with a light microscope and require an electron microscope instead.

Answer:

C. Most viruses