[Campbell Biology P.799] According to Figure 34.49 and its caption, what do the Laetoli foot... | Practice Question

According to Figure 34.49 and its caption, what do the Laetoli footprints primarily confirm?

  • A: Hominins were exclusively tree-dwellers 3.5 million years ago.
  • B: Upright posture evolved early in hominin history, over 3.5 million years ago.
  • C: Australopithecus garhi was the first hominin to use stone tools.
  • D: Long-distance bipedalism began about 1.9 million years ago.

Explanation

Figure 34.49 a explicitly states: 'The Laetoli footprints, more than 3.5 million years old, confirm that upright posture evolved quite early in hominin history.'