User:Yeptune/sandbox
From Wikipedia, the free encyclopedia
The webbed foot is a specialized limb present in a variety of vertebrates to aid in locomotion. This adaptation is primarily found in aquatic species, and has convergently evolved many times across vertebrate taxa. It likely arose from mutations in developmental genes that normally cause tissue between the digits to apoptose. These mutations were beneficial to many aquatic animals because the increased surface area from the webbing allowed for more swimming propulsion and swimming efficiency, especially in surface swimmers.[2] The webbed foot also has enabled other novel behaviors like escape responses and mating behaviors.
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![](http://upload.wikimedia.org/wikipedia/commons/thumb/b/be/Duck%27s_Foot_Drawing.jpg/193px-Duck%27s_Foot_Drawing.jpg)