"Experiments with fruit flies in laboratories have demonstrated evolution" (Claim #E9175)
Response
Actually, we have not observed evolution in the fruit fly experiments. In fact, we have observed the direct opposite, de-evolution. Many weak, deformed, and sickly flies were produced as a result of the mutations, but the fruit flies gained no new features.
In fact, one of the scientists behind these experiments, Eric Francis Wieschaus, admitted that his experiments did not provide much evidence for macroevolution. 1
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Sources
Meyer, S. C. (2013). Darwin's Doubt: The Explosive Origin of Animal Life And the Case for Intelligent Design. New York: HarperOne.
Notes
- Meyer, 2013, p. 256: "Another questioner then asked Wieschaus about the implications of his findings for evolutionary theory. Here Wieschaus responded more soberly, wondering aloud about whether his collection of mutants offered any insights into how the evolutionary process could have constructed novel body plans. "The problem is, we think we've hit all the genes required to specify the body plan of Drosophila," he said, "and yet these results are obviously not promising as raw materials for macroevolution. The next question then, I guess, is what are---or what would be---the right mutations for major evolutionary change? And we don't know the answer to that."" ↩