Analysis of large samples of human mitochondrial DNA has led some researchers to hypothesize that
A. all modern humans are descended from Neandertals in Western Europe.
B. all current human mitochondrial DNA comes from one woman who lived in Africa some 200,000 years ago.
C. all modern humans are descended directly from chimpanzees and gorillas, but not from orangutans.
D. all modern humans are not descended from robust australopithecines.
E. all H. erectus populations around the world eventually evolved into populations of H. sapiens.
B
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Which family structure provides an easier chance for social mobility?
a. Extended family b. Blended family c. Nuclear family d. Single-parent household e. Class stratification
How many mutually unintelligible languages have been identified?
A) more than 6,000 B) 2,000 to 3,000 C) fewer than 1,000 D) 4,000 to 5,000
Which of the following does not describe the biological theory of sexuality?
a. ?Response to physical stimulus b. ?Learned c. ?Product of biology d. ?Instinctual
The proportion of young to mature domesticated sheep is much higher than that
among wild sheep. Indicate whether the statement is true or false