The significance of viruses are:
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Viruses are widely used in genetic research since they are the smallest and simplest biological entities known which are capable of self-replication.
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Viruses such as phages are commonly used as vectors in genetic engineering technology to carry foreign DNA.
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Phages can be easily cultivated under controlled conditions and hence have received considerable attention in viral research.
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The bacteria-virus interaction have been used to study host-parasite relationships.
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The host-parasite relationship studies between bacteria and phages(viruses) provide a better understanding of plant and animal infections with viral pathogens.
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It has become a model system for the study and research of viral pathogenicity.
