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Read the following statements and select the option which identifies the incorrect one(s).
(i) Witches broom disease are caused by viroids.
(ii) Retroviruses have two copies of ssRNA.
(iii) Dmitri Ivanowsky is related to Contagium vivum fluidum.

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detailed solution

Correct option is A

Witches broom disease are caused by mycoplasma. M.W. Beijerinck is related to Contagium vivum fluidum. Retroviruses are usually have two copies of genome.

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Read the following statements and select the option which identifies the incorrect one(s).(i) Witches broom disease are caused by viroids.(ii) Retroviruses have two copies of ssRNA.(iii) Dmitri Ivanowsky is related to Contagium vivum fluidum.

Remember concepts with our Masterclasses.

Ready to Test Your Skills?

free study material

Read the following statements and select the option which identifies the incorrect one(s).
(i) Witches broom disease are caused by viroids.
(ii) Retroviruses have two copies of ssRNA.
(iii) Dmitri Ivanowsky is related to Contagium vivum fluidum.