Scientist think that both bird's wings and a seal's flipper have the same ancestors.
That the birds and seals probably have the same ancestors.
That the birds and seals probably have the same ancestors.
That the birds and seals probably have the same ancestors.
That the birds and seals probably have the same ancestors.
Limbs.
Both the bird's wing and the seal's flipper are adapted for swimming, however they have different bone structures. The bird's wing contains long, lightweight bones with hollow spaces, while the seal's flipper has shorter, denser bones. The bird's wing has feathers for flight, while the seal's flipper is covered in skin to streamline movement in water.
Preadaption, that is, the development of new features through the refinement of existing ones
It is a flipper, which is a modified wing that penguins use to swim underwater.
They both contain skeletal bones.
Jointed phalanges.
humming birds
A flying bird's wing is in the shape of an airfoil.