Wednesday, February 16, 2011
Evolution by Natural Selection
The purpose of this experiment is to see how a group of finches adapt over time when a change in their environment is made. These changes could be made to the size of the island, the original amount of finches, how many eggs they lay, the amount of precipitation on the islands, etc. Hence, the finches will adapt to these new environmental factors that can be created. I believe that if I alter the size of the islands by making them bigger, and changing the annual amount of precipitation on each island, the finches’ beaks will change in size depending on the change in the amount of precipitation. In this case, on Darwin Island, I have increased the annual amount of precipitation from 20 cm to 100cm. On Wallace Island, I decreased the annual amount of precipitation from 20 cm to no precipitation whatsoever. On both of these islands, I changed the sizes from .5 km to 1 km.
My first hypothesis for this experiment is that with an increased amount of precipitation on one of the islands (Darwin), the seeds would be bigger and softer due to the increase in rainfall. A second part to this hypothesis is that the beaks would decrease in size due to the seeds becoming softer. With no precipitation on the other island (Wallace), the seeds would be smaller and harder due to lack of rainfall, which should lead to the finches’ beaks becoming larger and stronger, in order to break the harder seeds. My second hypothesis is that by increasing the size of both islands, from .5 km to 1 km, the finch population will increase dramatically over a century.
In this experiment, the materials necessary were a computer, internet access, and the link that was given to us on the University of Phoenix student website. In order to complete this experiment at hand, I needed to complete the lab. First and foremost, I read all of the information that was given... [continues]
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