A controlled experiment is designed to test whether h pylori...

A controlled experiment is designed to test whether H. Pylori can survive in acidic conditions that are similar to those found in the stomach. A result showing that H Pylori cannot survive in that environment would A) completely eliminate the chances that ulcers are caused by bacteria. B) damage the credibility of the theory that H. Pylori are the cause of peptic ulcers. C) lend credibility to the theory that ulcers are caused by stress and other physical factors. D) lend credibility to the theory that ulcers are caused by some form of bacteria, albeit not H. Pylori.

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00:01 Okay, so a controlled experiment is designed to test whether helicobacter pylori can survive in acidic conditions that are similar to those found in the stomach.

00:10 It results showing that helicobacter pylori cannot survive in that environment would do what.

00:16 So we have a completely eliminate the chances that ulcers are caused by bacteria.

00:22 B, damage the credibility of the theory that helicobacter pylory is the cause of peptic ulcers.

00:33 C, lends credibility to the theory that ulcers are caused by stress and other physical factors, or d, lends credibility to a theory that ulcers are caused by some form of bacteria, albeit not heliocobacter pylori.

00:49 So, let's look at what the information is basically telling us.

00:52 If helicobacter pylori cannot survive in ascetic conditions, that's all it's saying, that h.

00:58 Pylori cannot withstand.

01:10 Acidic conditions.

01:12 That is, all this experiment is telling you.

01:16 So we cannot, in good conscience, really do anything about c.

01:24 Cannot say c is possible because we're not saying that ulcers are only caused by stress.

01:31 We're only saying that helicovacter pylori is not able to cause ulcers, so we can't do that.

01:38 Let's see.

01:41 A, completely eliminates the chance that ulcers are caused by bacteria.

01:44 We don't know that...