Vestigial organs are structures that
- A. are equally useful in every species
- B. appear only in fossils
- C. function better than they once did
- D. have lost most or all of their original function in the course of evolution
Explanation
The human appendix, wisdom teeth and ear muscles persist as reduced remnants of structures that served our ancestors. Their existence is evidence of descent with modification, since a designer would have no reason to include them.
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