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15.) Vestigial Structure


This photo shows penguins. Penguin wings are an example of vestigial structures. Vestigial structures are things within an organism that no longer function the way they were intended. Working penguins, the wing doesn't work as a way of flight, instead it is used for gliding underwater. Vestigial structures can also be observed in whales (pelvic bones), humans (the coccyx and wisdom teeth), and flies (back wings). Vestigial structures are thought of by some as proof of evolution. 

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3.) Anther and Filament

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