Question

In the early days of germ theory, contagious diseases were thought to be caused by fungi or bacteria. In the 1890s, Dmitri Ivanovski filtered extracts from diseased tobacco plants and discovered that the disease could be transmitted to new plants through the filtrate. He concluded that the disease was caused by particles smaller than bacteria: the tobacco mosaic virus. Which best explains how Ivanovskiâs work led to a change in the germ theory?

Answer 1

He tried to promote his hypothesis as a law.
He used a new experimental method to test his hypothesis.
He used a more powerful bacterial strain than other scientists had.

Answer 2

Theory of Dmitri Ivanovski

Explanation:

• In 1892, the Russian biologist Dmitry Ivanovsky (1864–1920) utilized a Chamberland channel to contemplate that is presently known as the tobacco mosaic virus
• He saw that the operator duplicated uniquely in cells that were isolating and he considered it a contagium vivum fluidum (dissolvable living germ) and re-presented the word infection  
• New infections are assembled in the contaminated host cell. In any case, not at all like still simpler infectious agents, viruses contain genes