You are presented with the question "How can cells of the Tobacco Mosaic be seen?" and the following answer choices: 
- refraction of light
 - an area swollen with pus
 - by indirect light
 - death and devastation
 - bending light rays
 - electron microscope
 - deadly and devastating
 - Veins and arteries.

Now knowing that viruses are so small that they can be seen only with an electron microscope and viruses include the Tobacco Mosaic Virus, choose the best answer.


 

      electron microscope   