Case Study: The Tale of the Two Squirrels

What was the main food source for the squirrels before the sweetgum trees were planted?

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What was the environmental change in the park?

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What variation existed within the squirrel population?

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How did the reddish-brown fur become an advantage in the areas with sweetgum trees?

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Why might the gray-brown fur have become a disadvantage in those same areas?

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Explain how natural selection played a role in the changing number of reddish-brown squirrels.

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Do you think the gray-brown squirrels will disappear from the park entirely? Why or why not?

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Can you think of another example of how a variation in an animal or plant population might be helpful or harmful if the environment changes?

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