You are presented with the question "What are not cells at all, so they are neither prokaryotes nor eukaryotes?" and the following answer choices: 
- Something with a head, thorax, and abdomen
 - Microscopic organisms
 - The smallest agent of disease
 - Dead prehistoric beings
 - female sex cells
 - major threat to health
 - remains of prehistoric life
 - Something that smells like rotten eggs

Now knowing that viruses are not cells at all, so they are neither prokaryotes nor eukaryotes and viruses Viruses are the smallest agents of disease, choose the best answer.


 

   The smallest agent of disease      