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I.4 (a) Biological and Cultural factors in human evolution.

Biological factors

1. Factors related to Man

  • Nervous system- development of brain, PNS, CNS, Encephalization
  • Skeleton system – erect posture, opposable thumb, Ulnar opposition, Bipedalism
  • Integumentary system – homeostasis and homeothermy
  • Digestive system – omnivore diet
  • Reproductive system – large gestation period Sexual dimorphism

2. Factors related to Environment

  • Elaborate parental care
  • End of ice age, inter glacial period

Cultural factors

  • Discovery of fire
  • Agriculture
  • Instruments, implements
  • Social organization
  • Political organisation
  • Language
  • Wheel
  • Economic organisation
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