Phages are extremely diverse at the genetic level, but not so much at the structural level… why? (phage.directory)
Single-stranded1
Bacteriophages whose genetic material is RNA, which is single-stranded in all except the Pseudomonas phage phi 6 (BACTERIOPHAGE PHI 6). (lookformedical.com)
Viruses3
This category excludes Group VI, viruses with RNA genetic material but which use DNA intermediates in their life cycle: these are called retroviruses, including HIV-1 and HIV-2 which cause AIDS. (wikipedia.org)
The genetic diversity of RNA viruses is one reason why it is difficult to make effective vaccines against them. (wikipedia.org)
Deoxyribonucleic acid that makes up the genetic material of viruses. (lookformedical.com)
Material1
An RNA virus is a virus-other than a retrovirus-that has ribonucleic acid (RNA) as its genetic material. (wikipedia.org)