Fact 1: Viruses infect and live inside the cells of living organisms.

Fact 2: Pathogenic organisms that live inside cells have a neat adaptation.

Given the two facts above, answer the question "Viruses are what kind of organisms?" with the following options: 
- homogenous
 - more abundant
 - negative
 - symbiotic
 - toxic
 - bacteria
 - dangerous
 - pathogenic


 

        pathogenic 