a virus a protist a fungus a bacterium
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Dr. Wagner is investigating a newly discovered, disease-causing agent. She determines that one structure in the agent is double-stranded RNA. What kind of agent is Dr. Wagner studying?
Possibilities:
- a virus
- a protist
- a fungus
- a bacterium

a virus