Analysis biointeractive

Visit http://media.hhmi.org/biointeractive/vlabs/stickleback/index.html and follow the instructions to complete experiments 1, 2, and 3 regarding spines in sticklebacks. You do not need to complete the analysis section for each experiment, just select skip for that portion at the very end of each experiment. After each experiment a graph will be generated of your data (you can use the automated version). Right click on the graph and select Save Image (make note of where you save it). Then submit your graph images to this assignment as attachments. (5 points)

1. What conclusion can you draw from your graph in Experiment 1? (2 points)
2. One of the functions of pelvic spines in the ocean is to protect stickleback from larger fish predators. Based on this knowledge, what might be a possible explanation for the differences in pelvic spines between Bear Paw Lake and Frog Lake sticklebacks? (3 points)
3. What is the relationship between age and position of sediment layers in the Nevada lake quarry? (3 points)
4. How would you test whether the ancient Nevada lake contained predatory fish? (3 points)
5. Living populations tell us about mechanisms of selection; fossils provide a record of change over time. Based on what you have learned in this virtual lab, would you agree or disagree with this statement? (4 points)

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