The main characteristics of viruses are as given below:The viruses did not get any place in the five kingdom classification of Whittaker because they are not truly living.Viruses are smaller and simple types of microorganismsThey are very small that they get filtered from filter paperThey are obligate parasites which means they can't replicate without the host.They multiply in the host organism using their machinery Viruses consist of only two components proteins and genetic materialViruses cause various diseases in plants and animals such as aids, hepatitis, polio, etc.