How strictly is evolution being defined here? Any useful mutation could be considered evolution, when considered at the individual level. And if we're talking species wide adapation of particular traits...well, 200 years is too short a time span for anything to have spread that quickly.
When in doubt, critique the question, if it looks suspiciously flawed. Because if it is, then it probably was done on purpose, and it means there are marks to be picked up. Especially if this is, say, undergraduate level or so.
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"History comforts the dull-witted."
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