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Unformatted text preview: Questions for Week 2 1. Why would an observed shift in flowering time from 1997 to 2004 NOT be sufficient evidence for an evolutionary change? An observed shift in flowering time in this short period would not be sufficient evidence for an evolutionary change for a number of different reasons. First, evolutionary changes occur over a long period of time with maintained records of previous decedents. The B. Rapa plant didnt necessarily evolve into a completely different species, rather they adapted to the different growing patterns. Evolution is a response to natural selection, this natural selection was not at play in this experiment because they controlled the many aspects of how the plants were suppose to evolve. I believe another reason why using one drying period isnt sufficient is because in order to show that a species has evolved you would have to consistently show that this species has continued to pass on this trait to the next generation. The article states that there was only a has continued to pass on this trait to the next generation....
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- Spring '08