Answer
D.
Work Step by Step
A major difference between the ardipithecines and the australopithecines is that the latter had gracile and robust forms.
Biology 12th Edition
by Mader, Sylvia; Windelspecht, Michael
Published by
McGraw-Hill Education
ISBN 10:
0078024269
ISBN 13:
978-0-07802-426-9
Chapter 30 - Human Evolution - Assess - Page 578: 6
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