Viruses
Lesions on chorioallantoic membrane are produced by

Herpes simplex virus
Vaccinia virus
all of these
Herpes B virus

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

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

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