Fossils suggest that the first major trait distinguishing hominin...

Question

Fossils suggest that the first major trait distinguishing hominins from other primates was
a. a larger brain.
b. erect posture.
c. forward-facing eyes with depth perception.
d. tool making.

Accepted Answer

Hello everyone here we have a question that says bipedal isM is considered a very old trait which of the following provided a clue of an upright stance among humans. The number of vertebrae, the presence of coccyx and the size of vertebrae would not give us a clue of an upright stance, so we know that A. B. And C. Are all incorrect. The opening in the skull base in which the spinal cord exits is located in chimpanzees and other spaces that are primarily quadra peds. The spinal cord exits towards the rear of the skull at an angle that allows the eyes to face forward and bipeds, including humans. The spinal cord emerges from the floor of the brain case so the head can be held directly over the body. So the opening and the skull base in which the spinal cord exits gave us a clue of an upright stance among hominids. So our answer here is the thank you for watching. Bye.

Fossils suggest that the first major trait distinguishing hominins from other primates was a. a larger brain. b. erect posture. c. forward-facing eyes with depth perception. d. tool making.

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