Viruses

Life on Earth 003 - Viruses Paul Andersen describes the important characteristics of viruses. He starts with a brief description of origin theories. He then describes the two characteristics of all viruses; genetic information and protein coats. He also describes how some viruses use specialized envelopes to gain entry to their host cells. He also explains the lytic and lysogenic reproductive cycles. Intro Music Atribution Title: Artist: CosmicD Link to sound: