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4 Written questions

4 Multiple choice questions

  1. causes disease in tobacco plants.
  2. contain RNA or DNA in a protein coat.
  3. is the protective outer coat.
  4. bacterial viruses with a polyhedral head & a helical tail.

4 True/False questions

  1. the study of virusesis the protective outer coat.

          

  2. viroidcontains only a nucleic acid.

          

  3. Viruseshave nuclei & organelles.

          

  4. clearcutting of forestsis a part of biology because they are active inside living cells.

          

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