How did Barry Marshall test the hypothesis that H. pylori causes stomach ulcers?
A) He surveyed people with stomach ulcers about the acidity of their food.
B) He ingested live H. pylori and developed acute stomach pain.
C) He interviewed physicians who performed surgeries on ulcer patients.
D) He fed spicy foods to laboratory rats to eliminate an alternate hypothesis.

Question

Quizplus · Accepted Answer

Barry Marshall ingested live H. pylori to test if it caused stomach ulcers. He then developed acute stomach pain, and later, samples of his stomach lining revealed the presence of H. pylori bacteria. This experiment provided strong evidence that H. pylori is the cause of stomach ulcers.

How Did Barry Marshall Test the Hypothesis That H