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Until recently, many anthropologists assumed that the environment of what is now the southwestern United States shaped the socia
Until recently, many anthropologists assumed that the environment of what is now the southwestern United States shaped the socia
admin
2014-09-13
91
问题
Until recently, many anthropologists assumed that the environment of what is now the southwestern United States shaped the social history and culture of the region’s indigenous peoples. Building on this assumption, archaeologists asserted that adverse envi-
line ronmental conditions and droughts were responsible for the disappearances and
5 migrations of southwestern populations from many sites they once inhabited.
However, such deterministic arguments fail to acknowledge that local environmental variability in the Southwest makes generalizing about that environment difficult. To examine the relationship between environmental variation and sociocultural change in the Western Pueblo region of central Arizona, which indigenous tribes have occupied
10 continuously for at least 800 years, a research team recently reconstructed the climatic, vegetational, and erosional cycles of past centuries. The researchers found it impossible to provide a single, generally applicable characterization of environmental conditions for the region. Rather, they found that local areas experienced different patterns of rainfall, wind, and erosion, and that such conditions had prevailed in the Southwest
15 for the last 1,400 years. Rainfall, for example, varied within and between local valley systems, so that even adjacent agricultural fields can produce significantly different yields.
The researchers characterized episodes of variation in southwestern environments by frequency: low-frequency environmental processes occur in cycles longer than one
20 human generation, which generally is considered to last about 25 years, and high-frequency processes have shorter cycles. The researchers pointed out that low-frequency processes, such as fluctuations in stream flow and groundwater levels, would not usually be apparent to human populations. In contrast, high-frequency fluctuations such as seasonal temperature variations are observable and somewhat predictable, so that
25 groups could have adapted their behaviors accordingly. When the researchers compared sequences of sociocultural change in the Western Pueblo region with episodes of low- and high-frequency environmental variation, however, they found no simple correlation between environmental process and sociocultural change or persistence. Although early Pueblo peoples did protect themselves against environmental risk and
30 uncertainty, they responded variously on different occasions to similar patterns of high-frequency climatic and environmental change. The researchers identified seven major adaptive responses, including increased mobility, relocation of permanent settlements, changes in subsistence foods, and reliance on trade with other groups. These findings suggest that groups’ adaptive choices depended on cultural and social as well as envi-
35 ronmental factors and were flexible strategies rather than uncomplicated reactions to environmental change. Environmental conditions mattered, but they were rarely, if ever, sufficient to account for sociocultural persistence and change. Group size and composition, culture, contact with other groups, and individual choices and actions were— barring catastrophes such as floods or earthquakes—more significant for a population’s
40 survival than were climate and environment.
Description
The passage describes research that bears on a presumed historical relationship between environmental variation and sociocultural change among indigenous people of the southwestern United States. The author mentions in the first paragraph that many anthropologists believed until recently that environmental variations explain changes in the human populations of the region. The passage then goes on to point out studies that show problems with this explanation, including the lack of generally applicable characterizations of the environment in the region and lack of correlation between environmental changes and sociocultural changes. In the final paragraph the author mentions an alternative explanation in researchers’ findings suggesting that responses to environmental changes varied according to differing factors such as group size and composition, culture, contact with other groups, and individual choices.
It can be inferred from the passage that which of the following activities is NOT an example of a population responding to high-frequency environmental processes?
选项
A、Developing watertight jars in which to collect and store water during the rainy season
B、Building multistory dwellings in low-lying areas to avoid the flash flooding that occurs each summer
C、Moving a village because groundwater levels have changed over the last generation
D、Trading with other groups for furs from which to make winter clothes.
E、Moving one’s herds of grazing animals each year between summer and winter pastures
答案
C
解析
The phrasing of the question indicates that all but one of the answer choices are examples of a population responding to a high-frequency environmental process. You are asked to choose the one answer choice that does not provide such an example. Choices A, B, D, and E are incorrect because they all present responses to high-frequency environmental processes: developing water-storage jars to adapt to seasonal rainfall variations, adapting dwellings in response to seasonal flooding, trading to acquire clothing in adaptation to seasonal temperature variations, and moving grazing herds seasonally. Choice C is the best answer: the passage mentions fluctuations in ground water levels as a low-frequency process(lines 21-22); moving a village because of a change that takes place over the course of a generation is not a response to a high-frequency process.
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本试题收录于:
GRE VERBAL题库GRE分类
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GRE VERBAL
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