A botanist observes that tobacco leaf extract remains infectious even after passing through a Porcelain filter. Who first discovered this filterable nature?
Q1. A botanist observes that tobacco leaf extract remains infectious even after passing through a Porcelain filter. Who first discovered this filterable nature?
Answer: Iwanowski
Explanation: Iwanowski demonstrated that TMV could pass through bacteria-proof filters; Stanley fails because he was the first to crystallize the virus.