1: C . Viruses are complicated assemblies of molecules, including proteins, nucleic acids, lipids, and carbohydrates, but on their own they can do nothing until they enter a living cell. Without cells, viruses would not be able to multiply. Therefore, viruses are not living things.
2: C. (Cells At Work! is a great show to watch if you want to learn about the body and how it operates, and to learn about what cells do what.)
3: D. There are multiple formations of the virus. For every virus, there's more than one type, and they do different or affect the same area and have extremely similar symptoms.
