6.Evolution
medium

તેઓના પૂર્વજોમાંથી આધુનિક માનવ (હોમોસેપિયન્સ) ની ઉત્ક્રાંતિ માટે કયું વધુ અગત્યનું વલણ છે?

A

જડબાનું સાંકડું થવું

B

ત્રિનેત્ર પરિમાણ દૃષ્ટિ

C

વધતી મગજની શક્તિ

D

સીધી અંગસ્થિતિ

(AIPMT-2011) (AIPMT-2012)

Solution

(c) : Binocular vision, smaller jaw and upright posture are the main adaptations that led to evolution of man from its ancestors. But, during human evolution major and most significant changes occurred in the cranial capacity ofman. In living modern man it is about $1450\ cc$ compared to $500\ cc$ in Australopithecus. Increased cranial capacity accommodates larger brain and forms the basis of social, cultural and educational evolution of modern man.

Standard 12
Biology

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