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Earth's rotation (turning on its axis) causes

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The cows in a rancher's herd of cattle have been selectively bred to produce milk. Which of the following will cause the next generation of cows to receive the trait for producing large quantities of milk?

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Which of these events have the most influence on regional climate?

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The brown fur of the arctic hare turns white in winter. How does this color change most likely help the arctic hare?