Which statement best explains the early development and then disappearance of hind limbs in dolphins?
Understand the Problem
The question is asking which statement best explains the early development and subsequent disappearance of hind limbs in dolphins, implying a focus on embryonic development and evolutionary biology.
Answer
The early ancestors of dolphins had hind limbs.
The statement that best explains the early development and then disappearance of hind limbs in dolphins is: The early ancestors of dolphins had hind limbs.
Answer for screen readers
The statement that best explains the early development and then disappearance of hind limbs in dolphins is: The early ancestors of dolphins had hind limbs.
More Information
Dolphins develop hind limb buds during embryonic stages due to vestigial structures inherited from terrestrial ancestors. These structures disappear as they are not needed for their aquatic lifestyle.
Tips
A common mistake is assuming limb disappearance is actively required for adaptation, rather than an evolutionary remnant no longer developed.
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