Viruses
Plant viruses may be cultivated in

cultures of separated cells
tissue culture
all of these
whole plants

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

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

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