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What term did Dmitri Ivanowsky use to describe certain microbes causing the mosaic disease of tobacco?
  • a)
    Bacteria
  • b)
    Prions
  • c)
    Viruses
  • d)
    Viroids
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
What term did Dmitri Ivanowsky use to describe certain microbes causin...
Dmitri Ivanowsky used the term "virus" to describe certain microbes that were responsible for the mosaic disease of tobacco.
  • These microbes were smaller than bacteria and passed through bacteria-proof filters.
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What term did Dmitri Ivanowsky use to describe certain microbes causin...
Dmitri Ivanowsky and the Mosaic Disease of Tobacco


Dmitri Ivanowsky was a Russian botanist who is credited with the discovery of viruses. In 1892, he conducted an experiment to investigate the cause of the mosaic disease in tobacco plants. He found that even after passing the sap of infected plants through a filter fine enough to remove bacteria, the disease was still transmitted to healthy plants. This led him to conclude that the causative agent was smaller than bacteria.

Virus as the Causative Agent


Ivanowsky used the term "virus" to describe the unknown infectious agent responsible for causing the mosaic disease of tobacco. The term "virus" comes from the Latin word for "poison" or "slimy liquid," reflecting the mysterious and harmful nature of these tiny particles. Ivanowsky's groundbreaking work laid the foundation for the field of virology, which is the study of viruses and viral diseases.

Importance of Ivanowsky's Discovery


Ivanowsky's identification of viruses as the cause of the mosaic disease of tobacco was a pivotal moment in the history of microbiology. It challenged the prevailing belief that all infectious agents were bacteria and opened up new avenues for research into the world of submicroscopic particles. His work paved the way for further studies on viruses and their role in causing diseases in plants, animals, and humans.
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What term did Dmitri Ivanowsky use to describe certain microbes causing the mosaic disease of tobacco?a)Bacteriab)Prionsc)Virusesd)ViroidsCorrect answer is option 'C'. Can you explain this answer?
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