Dark skin is found in populations near the equator. Why?
a. ?It protects from the damaging effects of UV radiation on folate.
b. ?It protects from frostbite.
c. ?It increases the chance of heat evaporation.
d. ?It increases the skin's exposure to ultraviolet radiation.
e. ?It helps prevent rickets.
a
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Oldowan pebble tools
A. were found at the same site and stratigraphic layer as the Ardipithecus kadabba fossils, dramatically pushing back in time the onset of stone tool use to the late Miocene. B. contain evidence that they were used on fellow hominins, providing the earliest evidence of human warfare and cannibalism. C. include elaborate axes and spears. D. were also used to decorate burial sites, suggesting very early symbolic thought. E. are obviously manufactured stone tools that consist of flakes and cores.
Most primatologists see the differences between humans and nonhuman primates as a difference primarily of __________
Fill in the blank(s) with correct word
The social rules and cultural meanings of all sexual behavior are subject to great variability from one society to another
a. True b. False Indicate whether the statement is true or false
Australopithecus africanus has been found throughout __________
a. central Africa b. southern Africa c. eastern Africa d. western Africa