Which of the following does NOT contribute to the high degree of stability of DNA?
A. its morphological structure
B. its chemical structure
C. its regulation mechanisms
D. its location or position in a cell
Answer: D
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Many scientists believe that the loss of the megafauna at the end of the Pleistocene was due to overhunting. What factor gives reason to question this hypothesis?
A) The population of humans at the time was far too low to have had such an effect on mammal populations. B) Many birds went extinct around the same time, and there was no evidence that they were hunted. C) There is evidence that Pleistocene people scavenged, rather than hunted, for their meat. D) The megafauna did not go extinct; rather, the changing climate at the time favored smaller variants of these species.
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.
What innovation from Upper Paleolithic culture had the most lasting importance for humans, both in the Old and New Worlds?
A) domestication of plants and animals B) social stratification and war C) big game hunting strategies D) the discovery of stone tools
Tomato growing on large farms in California today is characterized by
A) high yields per acre. B) mechanization of harvesting. C) corporate ownership of land. D) breeding tomatoes for ease of commercial processing. E) all of the above.