A. Viruses reproduce using a . b. What are the differences between proviruses and viral DNA?

c. Why is the common cold virus so difficult to cure?

1. DNA or RNA

Explanation :

A virus is an infectious particle that reproduces by "commandeering" a host cell and using its machinery to make more viruses. A virus is made up of a DNA or RNA genome inside a protein shell called a capsid. Some viruses have an external membrane envelope.

2. DNA viruses contain usually double‐stranded DNA (dsDNA) and rarely single‐stranded DNA (ssDNA). These viruses replicate using DNA‐dependent DNA polymerase. RNA viruses have typically ssRNA, but may also contain dsRNA. ssRNA viruses can be further grouped as positive‐sense (ssRNA(+)) or negative‐sense (ssRNA(−)).

3. i dont know the answer

the answer is c cumulus. cumulus clouds can be seen on a gray and rainy day, because cumulus clouds create thunderstorms. give me brainliest if right.

not sure if this is what you'r looking for nnew= nold