| 1. | Hard to tell, because the proper controlled experiments have not been done.
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| 2. | True, but those were not really controlled experiments and not carefully evaluated.
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| 3. | There are still no reports of systematic, controlled experiments with varying parameters.
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| 4. | Experimental evolution uses controlled experiments to test hypotheses and theories of evolution.
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| 5. | Regression methods are important in econometrics because economists typically cannot use controlled experiments.
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| 6. | Of course, this is not a controlled experiment; other contributing factors have changed.
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| 7. | Controlled experiments have consistently failed to demonstrate a link between diet and obesity.
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| 8. | Controlled experiments require the manipulation of one or more dependent variable.
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| 9. | Yariv Grobshtein performed a controlled experiment, which had two major goals:
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| 10. | In controlled experiments, EPO receptor is not detected in those tissues.
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