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Biological Classification — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYBiological Classification1 Mark
MCQ
Potato spindle tuber disease is caused by:
  • A
    Phycobionts.
  • B
    Virus.
  • C
    Bacteria.
  • D
    Viroids.
✓

Answer

  1. Viroids.

Explanation:

In 1971, Diener discovered a new infectious agents called Viroids that was smaller than viruses.
These viroids causes potato spindle tuber disease.

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