Organisms:
* Eukaryotes: All eukaryotes, including animals, plants, fungi, and protists, have DNA genomes.
* Prokaryotes: Most prokaryotes (bacteria and archaea) also have DNA genomes.
Viruses:
* DNA viruses: Many viruses have DNA genomes, such as herpesviruses, adenoviruses, and poxviruses.
* RNA viruses: However, there are also many viruses that have RNA genomes, such as HIV, influenza virus, and coronaviruses.
Exceptions:
* Some viruses: A small number of viruses have genomes composed of other molecules, like the Hepatitis B virus, which has a DNA genome but also uses reverse transcriptase to produce RNA intermediates.
In summary:
While DNA is the primary genetic material for most life forms, including the majority of viruses, there are notable exceptions. Some viruses have RNA genomes, and a few have unique genetic material compositions.
