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Tailbone of a human- A vestigial structure is one that has become useless or of no purpose with evolution. Humans have tail bones but they are not used as tails or in any way.

Answer: Tailbone of human

Explanation: The organs in the human body that are of no use now. These structures have lost their original functions in the body of the organism.

Although the vestigial organs have lost their original functions but it can develop new functions over time.

Example: Tailbone of humans, wisdom teeth are no longer used in human beings.

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