Which of the following hypotheses is NOT directly testable using experiments? - vitamin d and the bladder
a. Artificial sweeteners can cause bladder cancer.
b. Supplements of vitamin E can prolong life.
c. Athletes are more aggressive than non-athletes.
d. mammals appeared in the world of the living before the extinction of the dinosaurs.
Friday, December 11, 2009
Vitamin D And The Bladder Which Of The Following Hypotheses Is NOT Directly Testable Using Experiments?
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D.
Can perform a real experience. All he can do is try to find fossil evidence and the date.
D. Why? Because there are no living dinosaurs with test ...
C determine the dates the fossils of animals in a few hundred years, and very questionable. But the emotions and aggression are not directly verifiable.
D. You can not test an environment with dinosaurs on them to this hypothesis. You can see what has already happened, is not really an experience.
The answer is D. There are no dinosaurs alive today, he can not be used for experimental purposes.
"A" can by feeding artificial sweeteners, which are interests of a group of animals tested, then determine whether there is a significant increase of bladder cancer compared to untreated controls.
"B" can by supplemented vitamin E in a group of animals and control over their lives against the life cycle is shown by untreated controls.
"C" can be tested, provided a standard set of behaviors or attitudes characteristic of aggressive behavior is used, not to compare these characteristics between athletes and athletes. To succeed, we also need a set of criteria for determining whether a person is an "athlete" and "non-athlete." This can be difficult to prove that "A" or "B", but still possible.
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