Fact 1: Viruses are not cells.

Fact 2: Viruses include the Tobacco Mosaic Virus.

Given the two facts above, answer the question "What is not made up of cells?" with the following options: 
- an object
 - Veins and arteries.
 - Tobacco mosaic
 - an organism's body
 - Conifers
 - sensory neurons
 - layers of fat
 - the digestive system


 

   Tobacco mosaic      