Final answer:
The statement that a characteristic of bipedalism is a so-called valgus knee is true. This adaptation is important for positioning the knees and feet under the pelvis, aiding in upright walking and weight balance.
Step-by-step explanation:
One characteristic of bipedalism is a so-called valgus knee. This statement is True. Bipedal creatures, including early hominins and modern humans, have femurs that angle inward, creating the valgus knee. This anatomical structure positions the knees and feet under the center of the pelvis, which is essential for efficient and comfortable upright walking. The valgus angle helps to balance the weight of the upper body during bipedal locomotion and is a crucial adaptation for this mode of movement.