what is viroid how these infect plant cells ?how it differ from animal virus?
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Unlike certain viruses, viroids do not need the help of a virus to infect a cell. Unlike a virus of which the RNA can be copied in the cytoplasm or the nucleus, the viroids RNA is copied in the nucleus only.. Special techniques must be used to detect their presence in the plant tissues.
Plant viruses (Phytophages) principally attack plants and majority of them possess single stranded RNA. Plant viruses or reoviridae contain of RNA as genetic material. ... Animal viruses (Zoophages) are those viruses that principally attack animals and possess double stranded DNA.
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