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chap9sec1
| Term | Definition |
|---|---|
| virus | a tiny nonliving particle that invades and then reproduces inside a living cell |
| host | the parasite or virus lives in or on |
| parasite | the organism that benefits by living on or in a host in a parasitism interaction |
| bacteriophage | a virus that inffects bacteria |
| vaccine | a substance used in a vaccination that consists of weakened or pathogens that can trigger the immune system into action |