Final answer:
Ardipithecus ramidus displayed a locomotion pattern that included bipedalism on the ground and quadrupedalism in the trees, based on several anatomical features. These features include the forward position of the foramen magnum, small upper arm bones, and the presence of opposable big toes.
Step-by-step explanation:
Locomotion Pattern of Ardipithecus ramidus
Ardipithecus ramidus, believed to be bipedal on the ground and quadrupedal in the trees, displayed a unique locomotion pattern. Based on the forward position of the foramen magnum and the small upper arm bones, it is concluded that Ardipithecus was bipedal, using its hind limbs for walking. The reduced canine and the presence of opposable big toes further support the hypothesis of bipedalism on the ground. This hypothesis is also corroborated by the findings of Ardipithecus fossils in heavily forested environments.