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Grade 7 Chapter 7:1
Viruses
7
Other
Not Applicable
07/28/2006

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Term
virus
Definition
a tiny,nonliving particle that invades and then multiplies inside a living cell;

are not cells,cannot perform life functions;

needs a living host to reproduce
Term
host
Definition
a living thing that provides a home or food for a parasite

a virus will use to reproduce inside
Term
parasite
Definition
an organism that survives by living on or in a host organism harming it
Term
bacteriophage
Definition
a virus that infects bacteria
Term
inner core
Definition
made of hereditary (genetic) material
Term
protein coat
Definition
covers virus to protect and attach itself to anothre living cell
Term
vaccine
Definition
made from weakened or altered viruses;

triggers the body's natural defenses sto that the body destroys the invading virus before it causes diseases
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