Fact 1: Populations of viruses do not grow through cell division because they are not cells.

Fact 2: Cells, the basic units of every living organism, proliferate by binary division.

Given the two facts above, answer the question "In what way do viruses not proliferate?" with the following options: 
- adding heat
 - at or near the margins
 - They may not survive.
 - dry conditions
 - heat or cold
 - by indirect light
 - Localized damage
 - binary division


 

        binary division 