Answer:
This layer is called a capsid. The viruses without one are called naked viruses. The naked virus is can be damaged more readily by things in the environment.
Explanation:
The additional protective layer of protein surrounds some viruses is capsid.
A virus is a very small size and with simple composition life form that replicates itself only inside the living cells of an organism. Viruses affects almost each life forms like animals, birds or human beings.
The protective layer is called a capsid. The viruses without this layer are the harmful viruses. They damage the cells more readily.
Thus, the additional protective layer of protein surrounds some viruses is capsid.
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