You are presented with the question "What are some viruses enclosed by? " and the following answer choices: 
- sub-units of species
 - phospholipids, fat, molecule
 - Germy surfaces
 - it keeps an organism warm
 - Something that comes in a bundle of fibers
 - Something made from fermented ricce
 - microorganisms
 - A compound that donates proton

Now knowing that some viruses have an envelope of phospholipids and proteins and some viruses are also enclosed by an envelope of fat and protein molecules, choose the best answer.


 

  phospholipids, fat, molecule       