Recent research on the origins of language suggests that a key mutation might have something to do with it. Comparing chimp and human genomes, it appears that
A. chimps share with humans all the genetic propensities for language but lack the language-activation mutation.
B. the speech-friendly form of the gene FOXP2 took hold in humans some 150,000 years ago.
C. chimps lack the tongue-rolling gene that all humans have, which might explain why they struggle to achieve clear speech.
D. a speech-friendly mutation occurred among Neandertals in Europe and spread to other human populations through gene flow.
E. the speech mutation occurred even before the hominin line split from the rest of the hominids.
Answer: B
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Pregnant women in developing countries face all of the following except:
a. malnutrition. b. a lack of trained medical personnel to deal with high-risk pregnancies. c. 80 to 600 times the risk of dying of complications of pregnancy than women in the industrialized world. d. increased vulnerability to HIV/AIDS. e. increased likelihood to seek contraceptive devices.
Displacement means that humans can speak of hypothetical situations and future events
Indicate whether the statement is true or false.
The "new" foods types that came along with agriculture and animal domestication include all EXCEPT
a. dairy products. b. wheat. c. fruits. d. barley. e. rice.
Because nonindustrial economies can have features of both horticulture and agriculture, it is useful to discuss cultivators as being arranged along a cultivation continuum. Which of the following generally occurs in moving toward the more intensive end of the cultivation continuum?
A. increasing economic specialization B. increased leisure time C. increased egalitarianism D. longer fallow periods E. improved overall health status of the population