Name the structures of the central nervous system and the peripheral nervous system and describe their functions.

Spinal cord, cranial nerves, white and gray matter, brain, brainstem
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you can find a very detailed answer on wikipedia which will earn you marks.

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.