Viruses
The temperate phage that have no site specificity for insertion and may even be able to insert multiple copies of their DNA into a single bacterial chromosome is

Phage Mu
λ DNA
λ phage enzyme
Phage Mn

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Viruses
The sequence of nucleic acid in a variety of viruses and viral host, will find more similarities

among different viruses than between viruses and their hosts
among different viral hosts than among different viruses
among different viral hosts than between viruses and their hosts
between viruses and their hosts than among different viruses

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