A structure in an organism that serves little to no use. Vestigial structures are degenerated and range from slightly harmful to useless to slightly useful. They are remnants of an organism's evolutionary past.
Hehe, I was studying this just now.Useless or nearing useless structures are considered vestigal.Snake's arms, whale's hipbones and human appendix are good examples.
Vestigiality describes homologous characters of organisms which have lost all or most of their original function in a species through evolution. These may take various forms such as anatomical...