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Evolutionary adaptations of Geospiza Finches of the Galapagos.

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Introduction

Evolutionary Adaptations of Geospiza Finches of the Galapagos Purpose: To investigate the probability of evolutionary adaptations in a simulated study of the finches of the Galapagos Islands. Hypothesis: There is a link between the food available on each island, the shape of the finches beak and the habitat the bird lives in. The "link" is natural selection as explained by Darwin. Procedure: The various tools (i.e. pliers, forceps, etc.) provided will represent the beaks of the six species of Geospiza. Each student will be a member of one of the six species and will "forage" for seeds from the provided tray placed in the center of a table. Only species found on a certain Galapagos' island will compete for these seeds. ...read more.

Middle

Nature selects the best adapted varieties of species to survive and to reproduce. This process is known as natural selection. The beak varieties of the finches were associated with their diets, based on different foods. When the finches reached the islands, they dispersed to different environments where they had to adapt to different conditions. The more food a finch could get meant that it was better adapted to survive on the island with that food present on it. This also means that the island would be the ideal location for that finches niche or habitat. So the finches that were able to consume adequate amounts of food would survive and reproduce on the island. Their favorable traits would also be passed along generations, anatomically changing that finch species that would live on their island. ...read more.

Conclusion

Errors: Since each "island" or group performed the lab separately, the fashion in which the procedure was carried out may not have been the same for each. Some groups had more food to forage from, some groups foraged all at once, and some took turns foraging. This could cause inconsistent data collection and results. Suggestions: The procedure should be carried out in the same way for each group. Each group should forage from the same amount of food, and each group member should forage at the same time to mimic the competition that species face in real life. More trials could also be done to increase the accuracy of the results. It may require that one group go at a time to allow others to observe their procedure and make sure it is correct and the same as all the others. Kenny Dike 1 ...read more.

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