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what causes viruses

whats a virus a tiney ,nonliving particle that enters and then reproduces inside a living cell.
how are viruses different than organisms they only multiply when inside a living cell
whats a host a host is an organism that provides a source of energy for other viruses
what dose a virus act like a parasite ,an organism that lives on or in a host and causes it harm
what is bacteriophage it is a virus that infectsbacteria
what is a virus size are so small measuered in nanometers
where do viruses get their name from what they affect or from who di
Created by: sherlynvaz