Because bacteria have only DNA as genetic material but viruses have RNA or DNA as genetic material. viruses are harmful but most of the bacteria are useful.
Viruses aren't as "living" as the other three that you mentioned. The only thing viruses have in common with them is that they move. Viruses do not eat, breath, grow, or reproduce. They do reproduce,...
The 5 Kingdoms is a category which all living things fall into. They are: Plants Animals Bacteria Fungi ProkaryotesViruses have to have a host cell (or an 'invaded' cell) to survive, so scientists...