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Origin and Evolution of Life — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYOrigin and Evolution of Life3 Marks
Question
Australopithecus is described as a man with ape brain.
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Answer

(1) Australopithecus can be considered as a connecting link between ape and man due to the following ape-like and man like characteristics shown by it.

(2) The ape-like characteristics of Australopithecus:

  • The jaws and teeth were larger than those of modern man.
  • The face was prognathous, i.e. it had a muzzle like slope
  • The chin was absent
  • The eye-brow ridges projected over the eyes
  • Their cranial capacity ranged from 450-600 c.c.

(3) The man-like characteristics of Australopithecus:

  • It walked nearly or completely straight due to erect posture.
  • The vertebral column had a distinct lumbar curve with broad basin-like pelvic girdle.
  • Dentition was man-like with the smoothly rounded parabolic dental arch.
  • A simian gap was absent. Australopithecus is therefore, rightly described as a man with ape brain.

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