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In evolution theory, 'survival of the fittest' is a popular principle. However, this does not mean that the fastest or strongest organism always has better chances for survival. In desert areas for example, a slow animal which uses very little energy and requires little water may have better chances for survival than a big, strong and fast animal with high energy requirements. In this case, the slow animal has higher fitness for its purpose, which is survival in that given area.

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13y ago

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