Tobacco mosaic virus was discovered by:
Correct answer: C. Ivanowsky
- A. Stanley
- B. Pasteur
- C. Ivanowsky
- D. D' Herelle
Explanation
Stanley was the first scientist to crystallize the tobacco mosaic virus (TMV) in 1935. TMV spreads mainly through contact between infected and healthy plants or contaminated tools. Ivanowsky, a Russian scientist, discovered that TMV could pass through filters that trapped bacteria, proving it was caused by a virus. Félix D'Hérelle discovered bacteriophages, viruses that infect bacteria, in 1917. Louis Pasteur, the father of microbiology, developed the germ theory of disease and created vaccines for rabies and anthrax.
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