Fossil evidence suggests that such land-dwelling arthropods as _____ had evolved by at least the Devonian.
A)trilobites
B)molluscs
C)scorpions
D)beetles
E)spiders

Question

Quizplus · Accepted Answer

The question specifically refers to land-dwelling arthropods, which means that the correct answer must be an arthropod that is known to have lived on land. Trilobites and molluscs are both arthropods, but they are primarily known as marine organisms and are not strongly associated with terrestrial environments. Beetles and spiders are also arthropods, but they did not evolve until much later in geologic history than the Devonian. Scorpions, on the other hand, are arthropods that are definitively known to have lived on land during the Devonian period, making them the best answer to the question.

Fossil Evidence Suggests That Such Land-Dwelling Arthropods as _____ Had