Vestigial structures

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Vestigial structures are those anatomical structures which have no discernable function in their present form in modern species, but may have had a function in that species' ancestors.

Examples of vestigial structures include, but are not limited to, the human appendix, the wings of an ostrich, the pelvic bones of a whale, and the eyes of the mole and the salamander.[1]

Vestigial structures are some of the best evidence in favor of evolution and against Intelligent Design because they are easily explained by natural selection, but it is very difficult to justify why a supposedly intelligent creator would include seemingly useless structures in the design of numerous organisms.


References

  1. http://www.bookrags.com/research/vestigial-structures-wap/