Paleozoic and Mesozoic marine invertebrate faunas differ primarily because ____.

Question

Quizplus · Accepted Answer

The primary difference between Paleozoic and Mesozoic marine invertebrate faunas is that Mesozoic fauna, both with hard and soft parts, were more adapted to burrowing in sediment. This adaptation is a significant evolutionary and ecological shift from the Paleozoic era, marking a change in habitat and behavior rather than the presence or absence of other animal groups like mammals or birds.

Paleozoic and Mesozoic Marine Invertebrate Faunas Differ Primarily Because ____