Question

All the limbs of a tetrapod are nearly equal in size and similar in shape with a membranous skin between the fingers. What would be the chief method of movement?

Answer 1

The webbed foot (membranous skin between fingers) is a specialized limb present in a variety of vertebrates to aid in locomotion. These mutations were beneficial to many semi-aquatic animals because the increased surface area from the webbing allowed for more swimming propulsion and swimming efficiency, especially in surface swimmers. The webbed foot also has enabled other novel behaviors like escape responses and mating behaviors.