For Questions , Use the Following Narrative

question 17

Multiple Choice

For Questions , use the following narrative
Narrative: Aspirin and polyps
A study done by the Ohio State University Medical Center examined whether or not taking an aspirin a day would help colon cancer patients reduce the chance of getting subsequent colon polyps.635 patients with colon cancer participated; 317 of them were randomly assigned to the aspirin group, and the other 318 patients were assigned to a placebo (non-aspirin) group.54 patients in the aspirin group developed subsequent polyps, compared to 86 patients in the non-aspirin group.Many confounding variables were controlled for in this well-designed randomized experiment.
-{Aspirin and polyps narrative} What percentage of patients on the placebo did not develop subsequent polyps?

• A)232/495 = 47%
• B)232/318 = 73%
• C)232/635 = 37%
• D)None of the above.

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Definitions:

Source-To-Sink

A concept describing the movement of materials or energy from a region of production (source) to a region of storage or consumption (sink) in organisms or ecosystems.

Pressure Flow

A hypothesis explaining the process by which sugars are transported in the phloem of plants from sources to sinks.

Active Transport

The movement of molecules across cell membranes from lower to higher concentration, requiring energy.

Phytoremediation

The use of plants to remove, degrade, or contain environmental pollutants from contaminated soil, water, or air.