8th Class Science Microorganisms : Friend and Foe Question Bank Microorganisms

  • question_answer Select the incorrect statement.

    A) Anthrax is a bacterial disease that affects humans and cattle.

    B) Rust of wheat is a fungal disease that spread by air.

    C) Citrus canker is a viral disease that affects citrus fruits.

    D) Yellow vein mosaic is a viral disease that affects bhindi.

    Correct Answer: C

    Solution :

    Citrus canker, a disease that affects citrus fruits, is caused by the bacterium Xanthomonas species. Infection causes lesions on the leaves, stems and fruits of citrus trees, e.g. lemon, oranges and grapes.


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