Final answer:
Viruses can infect all types of cells, including both prokaryotic (bacteria and archaea) and eukaryotic (animals, plants, fungi, and protists). They rely on the host's cellular machinery to replicate.
Step-by-step explanation:
The type of cells that viruses can affect includes both prokaryotic and eukaryotic cells. Viruses are not considered living cells themselves; they lack the machinery for their own metabolism and reproduction. Instead, they depend on the cellular mechanisms of their host. Viruses that infect bacteria, which are prokaryotic cells, are known as bacteriophages. The domain of Archaea, which includes archaean prokaryotic cells, has its own viruses as well. Eukaryotic cells, which include animal, plant, fungi, and protist cells, can also be infected by viruses. Consequently, viruses are highly adaptable to multiple types of host cells.