1. Study the graph in fig. 1-12. What is represented by the x-axis? the y- axis? While pollution level was high, which color of moth was most common? When pollution level decreased, which color moth was most common? Explain how these observations allowed scientists to make predictions about the two different color morphs of moths. 5 points.

2. Why must a control be included in any experiment? Use the following example to illustrate your response. A new drug that suppresses tumor growth has just been discovered. Write one paragraph in your own words. 2 points.

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