← Trends in human evolution

3 Primate & hominin features

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Primate characteristics

  • Grasping hands and feet with an opposable thumb; nails instead of claws.
  • Forward-facing eyes → overlapping fields → stereoscopic (3-D) vision and depth perception.
  • Flexible, rotating limbs and shoulder joints.
  • Large, complex brain relative to body size; long parental care.
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Hominins

Hominins are the group including modern humans and our bipedal ancestors (after the split from chimps). The defining early hominin trait is habitual bipedalism.

A fast check when identifying a hominin feature

  • Have I named the SPECIFIC feature (e.g. "opposable thumb"), not just "primate-like hands"?
  • Have I linked the feature to a functional advantage, not just described it?

Practise just this