But Social Security was never meant to be the only source. of income for people when they retire. Social Security. replaces about 40 percent of an average wage earnerâs income. after retiring, and most financial advisors say retirees will. need 70 percent or more of pre-retirement earnings to live. comfortably.
DNA viruses. Originally viruses were grouped and named according to the disease they cause, even if they are not closely related. For example Hepatitis A is an RNA virus and Hepatitis B is a DNA virus, but they both cause liver disease.Nowadays, however, viruses are grouped by their shared characteristics in much the same way as plants and animals are. All but one of the DNA virus families use double stranded DNA as their infectious 'code'.riginally viruses were grouped and named according to the disease they cause, even if they are not closely related. For example Hepatitis A is an RNA virus and Hepatitis B is a DNA virus, but they both cause liver disease.
Replication for the different types of viruses. DNA-viruses: The genetic information of DNA virus is encoded in DNA, and the replication process takes place in the host cell's nucleus, in the presence of DNA polymerase. RNA viruses: In these viruses the genetic information is encoded in RNA.The replication process takes place in the cytoplasm.he viral genome of a virus is a nucleic acid, DNA or RNA. It can be double-stranded (ds) or single-stranded(ss), and it might have a sense. The sense is a property possessed by some nucleic acids, the ssRNA.