An enzyme a chemical reaction. a slows down b speeds up c stops d provides stability for

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When a virus infects a host cell, it uses the cell's machinery to make copies of its own genetic material in a process called replication. finally, during the process of self-assembly, that protein shell and the copies of the virus's genetic material are assembled into new viruses.

Carbon-14 has a half-life of 5,730 years and most igneous rock is older than that.