Whales have what seem like remnants of a pelvis and femur, as shown here. What are these structures an example of?

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asked Jan 14, 2017 556 views

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Maxyfc · Answer 1 · 2017-01-19T05:22:07+0000

They're vestigial structures (meaning they're "left over" from some ancestor species of the whale). In the whale's ancestor species, the pelvis and femur were functional; over time, as the whale started living in the ocean and they became unnecessary, the pelvis and femur shrunk into what they are now.

Whales have what seem like remnants of a pelvis and femur, as shown here. What are these structures an example of?

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