The study by the Grants in the Galapagos showed that finches with larger beaks could survive lower rainfall because their larger beaks allowed them to secure more food when compared to finches with smaller beaks. This shows how __________
A. natural selection acts on variation within a species
B. spontaneous mutation causes evolution
C. gene flow allows for the survival of the species
D. inbreeding cannot occur between individuals with different acquired characteristics
Answer: A
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The anthropologist Dee Mack Williams, in studying herding practices among pastoralists in Inner Mongolia, found that
A) with the use of irrigation to create new pasture land, the sand dunes were disappearing. B) the herders always avoided sand dunes when herding their flocks, because sand dunes did not provide pasture. C) since his observations were made in a specific local environment, the conclusions were not useful to other scholars concerned with livestock production. D) the herders valued sand dunes as shelters when attacked by raiders. E) the herders valued the sand dunes in their environment because, among other things, the dunes helped to regulate the body temperature of their animals.
Biological and cultural changes enabled H. erectus to exploit a new adaptive strategy—gathering and hunting. This in turn was crucial for H. erectus to
A. diminish the rate of mortalities due to violent encounters with large animals and other hominins. B. overcome its greatest challenge: an imperfect bipedal gait. C. beat out H. habilis in competition for key ecological niches. D. push the hominin range beyond Africa, into Asia and Europe. E. bring about the onset of complex language.
Nonverbal communication includes all of the following EXCEPT:
a. hand gestures and touching. b. communication on a telephone. c. use of scents and perfumes. d. conversational distance e. eye contact.
Richard Dembo’s study of crack cocaine in west central Florida found that:
a. teenagers were dealing drugs to support their cocaine addiction. b. teenage dealers were using most of their income to support their families. c. teenage dealers were using most of their income for luxury items for themselves. d. adult dealers were coercing teenagers into selling drugs for commission. e. adult dealers were using drugs and forcing teenagers to support their families alone.