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Microorganisms: Friend and Foe — Science STD 8 — Question

Gujarat BoardEnglish MediumSTD 8ScienceMicroorganisms: Friend and Foe1 Mark
MCQ
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.
  • ✓
    Citrus canker is a viral disease that affects citrus fruits.
  • D
    Yellow vein mosaic is a viral disease that affects bhindi.
✓

Answer

Correct option: C.
Citrus canker is a viral disease that affects citrus fruits.
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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