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The significance of viruses are:

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