The most important event during the Cambrian period was the
A)emergence of the fishes.
B)ability of organisms to form an outer skeleton.
C)emergence of the trilobite.
D)ability of organisms to develop lungs.

Question

Quizplus · Accepted Answer

The emergence of an outer skeleton, or exoskeleton, was a significant development during the Cambrian period because it allowed organisms to gain protection from the environment and predators, as well as providing support for movement and growth. This innovation opened up new ecological niches and helped set the stage for the diversification of life that followed in the subsequent periods. While the emergence of fishes, trilobites, and lungs were also important events in the history of life, they occurred later in the evolutionary timeline and were not as transformative as the development of the exoskeleton during the Cambrian.

The Most Important Event During the Cambrian Period Was the