Both the pelvis and femur of a whale are called vestigial structures! Another example of this is a human’s tail bone. Hope this helped!
Explanation:
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B is the correct answer to your question hope it helped
In primary succession, newly exposed or newly formed rock is colonized by living things for the first time. In secondary succession, an area that was previously occupied by living things is disturbed, then re-colonized following the disturbance.
It carries oxygen throughout the body