There is evidence that ray-finned fishes originally 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 cephalochordates.
E)in freshwater environments.

Question

Quizplus · Accepted Answer

Ray-finned fishes are known to have evolved in freshwater environments. This is supported by the fact that the earliest known fossils of ray-finned fishes come from freshwater sediments dating back to the late Silurian period, around 420 million years ago. Additionally, many of the most basal (primitive) groups of ray-finned fishes are freshwater species. Therefore, choice E is the best answer.

There Is Evidence That Ray-Finned Fishes Originally Evolved