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Bacteria and Viruses



















              On the other hand, a virus is a tiny organism that can




       invade living cells. Because viruses contain only certain



       parts of a cell, they are not considered living things. A




                                                                                                      functions
       virus cannot carry out any life functions unless it gets


       inside a living cell called a host cell.                                                                                        n. an activity or purpose


















                                                                                                                                           Unit 11 | Bacteria and Viruses
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