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The most apparent change during the evolutionary history of $Homo\ sapiens$ is traced in
A
Loss of body hair
B
Walking upright
C
Shortening of the jaws
D
Remarkable increase in the brain size
Detailed Solution
The cranial capacity increased steadily during human evolution.
$Homo\ habilis$: 650–800 cc; $Homo\ erectus$: about 900 cc; Neanderthal man: about 1400 cc; modern $Homo\ sapiens$: about 1350–1450 cc.
This remarkable increase in brain size and complexity is the most apparent change, and it led to intelligence, language, tool-making and culture.
Upright walking, shortening of jaws and loss of body hair also occurred, but they are less marked than the increase in brain size.
Hence the most apparent change is the remarkable increase in the brain size.
$Homo\ habilis$: 650–800 cc; $Homo\ erectus$: about 900 cc; Neanderthal man: about 1400 cc; modern $Homo\ sapiens$: about 1350–1450 cc.
This remarkable increase in brain size and complexity is the most apparent change, and it led to intelligence, language, tool-making and culture.
Upright walking, shortening of jaws and loss of body hair also occurred, but they are less marked than the increase in brain size.
Hence the most apparent change is the remarkable increase in the brain size.