For example, mammals may have front limbs that look quite different and are used for different purposes. ... However, the front limbs of all three animals—as well as humans—have the same basic bone structure. The similar bones provide evidence that all four animals evolved from a common ancestor.
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For example, mammals may have front limbs that look quite different and are used for different purposes. ... However, the front limbs of all three animals—as well as humans—have the same basic bone structure. The similar bones provide evidence that all four animals evolved from a common ancestor.