Large, diverse, multicellular organisms first appeared in the fossil record approximately ________ million years ago during the ________.
A)290; Paleozoic era
B)600; Paleozoic era
C)363; Mesozoic era
D)50; Mesozoic era

Question

Quizplus · Accepted Answer

Large, diverse, multicellular organisms first appeared approximately 600 million years ago during the late Precambrian, which is just before the Paleozoic era.

Large, Diverse, Multicellular Organisms First Appeared in the Fossil Record