And retroviruses- an RNA virus that reverse transcribes itself into a DNA provirus: http://en.wikipedia.org/wiki/Reverse_transcribing_virus http://en.wikipedia.

And retroviruses- an RNA virus that reverse transcribes itself into a DNA provirus: http://en.wikipedia.org/wiki/Reverse_transcribing_virus http://en.wikipedia.org/wiki/Reverse_transcribing_virus