![subject](/tpl/images/cats/biologiya.png)
In the early days of germ theory, contagious diseases were thought to be caused only 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 hypothesized that something smaller than bacteria or fungi was responsible for the transmission of the disease.
![ansver](/tpl/images/cats/User.png)
Answers: 1
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Biology
![question](/tpl/images/cats/biologiya.png)
Biology, 21.06.2019 23:30
What is the relationship between absorbance of light and the rate of photosynthesis?
Answers: 1
![question](/tpl/images/cats/biologiya.png)
Biology, 22.06.2019 04:00
Awave has a wavelength of 15 mm and a frequency of 6 hertz. what is its speed?
Answers: 1
![question](/tpl/images/cats/biologiya.png)
Biology, 22.06.2019 12:30
Wich of the following are manual restraint techniques for dogs
Answers: 2
![question](/tpl/images/cats/biologiya.png)
You know the right answer?
In the early days of germ theory, contagious diseases were thought to be caused only by fungi or bac...
Questions
![question](/tpl/images/cats/geografiya.png)
![question](/tpl/images/cats/biologiya.png)
Biology, 21.01.2021 01:00
![question](/tpl/images/cats/mat.png)
Mathematics, 21.01.2021 01:00
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 21.01.2021 01:00
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 21.01.2021 01:00
![question](/tpl/images/cats/mkx.png)
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 21.01.2021 01:00
![question](/tpl/images/cats/mat.png)
Mathematics, 21.01.2021 01:00
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/biologiya.png)
Biology, 21.01.2021 01:00
![question](/tpl/images/cats/mat.png)
Mathematics, 21.01.2021 01:00