Question

Bacteria are invisible to humans except under a microscope. what evidence did Pasteur use to show that bacteria was the cause of soured wine?
A. heated wine didn't sour
B. capped wine didn't sour
C. filtered wine didn't sour
D. chilled wine Didn't sour

Answer 1

Pasteur said that heating the wine at about 120°F would make sure that the wine would not turn sour, so the option is A.

Here's the information link: http://www.faqs.org/health/bios/83/Louis-Pasteur.html