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Sequence No.

BIO-537

Give an brief account of origin and evolution of man.

 

Answer:

Evolutionary Trends During Human Evolution:
During human evolution, following morphological characters have exhibited:

  1. Straight Posture
  2. Bipedal locomotion
  3. Straightening of forehead
  4. Formation of chin
  5. Narrowing of Nose
  6. Sparse body hair
  7. Development of distinct lumber curve
  8. Development of broad basin - shaped iliac bones in the pelvic girdle.
  9. Increase in size of brain and cranial cavity
  10. Acetabular cavities shifted inward to give straight posture
  11. Flattening of Face
  12. Loss of Suproarbital ridges
  13. Opposable thumb in the hand for grasping
  14. Thining of jaw bones
  15. Reduction in the jaw musculature
  16. Reduction in size of canines
  17. Increase in intelligence
  18. Social and cultural organisation
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BIO-537

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