Final answer:
Biped and quadruped animals differ in their anatomy and function. Bipeds have adaptations for upright walking, while quadrupeds have a more efficient limb placement for movement. These differences allow them to perform different types of locomotion.
Step-by-step explanation:
Biped and quadruped animals differ in their anatomy and function. In bipeds, such as humans, their skeletal structure is adapted for upright walking. Their femur is angled inward, their spine has curves to balance the upper body, and their feet have an arch and a realigned big toe. On the other hand, quadrupeds have limbs placed under their bodies for more efficient movement, with the ends of their limbs and digits pointed forward. These anatomical differences allow bipeds and quadrupeds to perform different types of locomotion.