What do viruses do in order to
reproduce themselves

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Viruses may have arisen from mobile genetic elements that gained the ability to move between cells. They may be descendants of previously free-living organisms that adapted a parasitic replication strategy. Perhaps viruses existed before, and led to the evolution of, cellular life. OR There are all sorts of virus shapes and sizes. However, all virus particles have a protein coat that surrounds and protects a nucleic acid genome. This protein coat is called a capsid, and the instructions for making the protein subunits of the capsid are encoded in the nucleic acid genome of the virus. They keep on changing

Explanation:

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Question no 1) D i.e All of the aboveQuestion no 2) B i.e. Clean waste from the blood

Explanation:

The epidermis of the skin is made of 5 layers, the upermost layer is called stratum corneum which is made of keratinized dead cells which helps the skin from water loss. The skin also protects the body from pathogens, and epidermis of the skin goes under constant replacement after 28 days, So the answer is D

Kidney works as a excretory organ for blood so it cleans the waste from blood