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Viruses

Subject Science
Grade Level Grades 6-12
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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.

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