Answer:
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Explanation:
Genetic Change in Viruses. Viruses are continuously changing as a result of genetic selection. They undergo subtle genetic changes through mutation and major genetic changes through recombination. Mutation occurs when an error is incorporated in the viral genome
A salt or ester of phosphoric acid, containing PO43− or a related anion or a group such as —OPO(OH)2.
Peeing in a cup is required for a drug test
