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Biological Environment > Viral Benefits |
This site tells the story of the history of the universe. Click Earlier and Later to follow the story. Note: Many facts have been simplified to make them easier to understand. |
| A virus seems like a totally destructive thing, killing cells without doing any good. Usually this is true, but viruses can carry useful genes from one cell to another. Genetic engineers use viruses for this reason. | ||
| Like this web site? Buy the book! |
Biological Environment > Viral Benefits |
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