Which of the following is the most suitable indicator of $SO_2$ pollution in the environment?

  • A
    Fungi
  • B
    Lichens
  • C
    Conifers
  • D
    Algae

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Match the following:
Column $I$Column $II$
$(a)$ Potato spindle tuber$(i)$ Virus
$(b)$ Creutzfeldt-Jakob disease $(CJD)$$(ii)$ Viroid
$(c)$ Cholera$(iii)$ Prion
$(d)$ Leaf rolling and curling$(iv)$ Bacteria

Which statement is wrong for viruses?

For what is $D.J. Ivanowsky$ famous?

Which of the following is a type of lichen based on its growth form?

Lichens are useful as:

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