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.
From Wikipedia: "Vestigiality describes homologous characters of organisms that have seemingly lost all or most of their original function in a species through evolution." A penguin uses its wings to...
I don't really sharks have a pelvis, yes they have pelvic fins but i believe its in reference to the area its in. Sharks don't have pelvis because they are fish not mammals.
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...