Final answer:
Two methods for determining a primate's locomotion from its skeletal morphology are by analyzing the length of the limbs and the shape and structure of certain bones. The length of the arms may indicate brachiation, while the length of the legs may suggest leaping. These methods rely on the fact that different modes of locomotion require different anatomical adaptations.
Step-by-step explanation:
Two methods for determining a primate's locomotion from its skeletal morphology are by analyzing the length of the limbs and the shape and structure of certain bones. For example, longer arms may indicate a primate that moves by swinging from branch to branch (brachiation), while longer legs may suggest a primate that propels its body through the force of its lower limbs (leaping).
This is because different modes of locomotion require different anatomical adaptations. Brachiators need long arms for swinging, while leapers need long legs for powerful leaps. By examining the skeletal morphology, scientists can make educated guesses about how a primate moves and adapts to its environment.