By using primarily the sliders on the right side of the Parameters panel, which control variables new to our model, try to find conditions under which the finch population will evolve a bimodal distribution of beak sizes that persists for at least 100 years. Here are the new variables controlled by the sliders on the right side of the Parameters panel:

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he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

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