A) bacteria
B) virus
C) mycoplasma
D) algae
Correct Answer: B
Solution :
The Russian Biologist Ivanowsky (1892) demonstrated the occurrance of micro-organisms smaller than bacteria in tobacco leaves suffering from mosaic disease. Beijerinck, Leoffler, Frosch established the existence of viruses by discovering similar diseases in plants and animals.You need to login to perform this action.
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