Fact 1: Some viruses have an envelope of phospholipids and proteins.

Fact 2: Phospholipids are body fats, too.

Given the two facts above, answer the question "Some viruses have an envelope of" with the following options: 
- fats and proteins
 - allow growth
 - aerobic capacity
 - keeps the organism warm
 - wavelengths and photons
 - Chemical energy
 - looseness
 - To keep their body heat.


 

 fats and proteins        