There is Evidence That Ray-Finned Fishes Evolved

Question

There is evidence that ray-finned fishes evolved
A)in response to a crisis that wiped out the chondrichthyans.
B)directly from lampreys and hagfish.
C)early in the Cambrian period.
D)directly from lancelets.
E)the swim bladder from a lung.

Accepted Answer

The swim bladder, an organ that helps fish control their buoyancy, is believed to have evolved from a lung-like structure in early fish ancestors. This adaptation allowed fish to regulate their buoyancy in water more efficiently.