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Humans have a bowl-shaped pelvis, fixed big toes, and robust lumbar vertebrae, all skeleton adaptations for what type of locomotion?Multiple choice question.brachiationbipedalismglidingknuckle-walking

Question

Humans have a bowl-shaped pelvis, fixed big toes, and robust lumbar vertebrae, all skeleton adaptations for what type of locomotion?Multiple choice question.brachiationbipedalismglidingknuckle-walking

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Solution

The correct answer is bipedalism. These skeletal adaptations - a bowl-shaped pelvis, fixed big toes, and robust lumbar vertebrae - are all features that support humans in walking upright on two legs, which is known as bipedalism.

Here's a step-by-step explanation:

  1. Bowl-shaped pelvis: The bowl shape helps to support the internal organs while standing and walking upright. It also helps to balance the body's weight over the legs.

  2. Fixed big toes: Unlike other primates who have opposable big toes for climbing trees, humans have big toes that are in line with the other toes. This helps in forward propulsion during walking and running.

  3. Robust lumbar vertebrae: The lumbar vertebrae in humans are larger and stronger compared to other primates. This is because they bear more weight, helping to stabilize the body during bipedal locomotion.

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