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The primary purpose of the passage is to
According to the passage, which of the following statements about the "cultural centers" is true?
Which of the following best describes the relationship between the first paragraph and the second paragraph of the passage?
Which of the following issues would it be most useful to resolve in order to evaluate the proposed explanation of the continued rise in the official count of deaths due to Tomkin's disease?
Several factors contribute to the____________ of swordfish, including the speed at which they travel, the vast distances they cover in their migration, and their impressive stamina.
In the sea, the normally strict relationship between latitude and temperature is ____________ along coasts by ocean currents: warm currents can extend tropical and subtropical temperatures poleward, while cool currents lower temperatures in these latitudes.
Brennan' (i)____________ is being blamed for damaging the company's reputation. Her lawyers, however, say that she does not lie and that she's been nothing but (ii)____________ from the beginning.
Today we do not generally view wildfires as (i)____________; but indigenous Californians recognized centuries ago that fires can (ii)____________ of many resources, such as acorns and mesquite beans, by eliminating underbrush.
African American organizations' subscriptions to Freedom 's Journal are mentioned in the passage primarily in order to
Which of the following, if true, would most tend to undermine Gross's argument mentioned in the highlighted portion of the passage?
The human colonization of Europe took place in at least two stages. After half a million years ago, settlement is widespread and well documented in both the northern and the southern regions of Western Europe. Sites in most regions yield hand axes and the skeletal remains of people who appear to have been ancestral to the Neanderthals. But prior to 500,000 years ago, the pattern of settlement is different. Firmly dated sites are extremely rare and currently confined to southern Europe. Although scarce, human skeletal remains must be assigned to other hominid taxa. Hand axes and other bifacial tools are largely-if not wholly-absent.

The earlier phase of occupation, which began at least 800,000 years ago, appears to represent one or more colonization events by relatively small numbers of humans. Both their skeletal morphology and their tools suggest that they may have had little connection with the people who colonized Europe after 500,000 years ago, and they might have failed to establish long-term settlement. The lack of known sites in northern Europe suggests that the initial occupants may have been unable to cope with environments above 41°-42° North (that is, above latitudes already settled by Homo erectus in Asia).

Documenting the early phase of European colonization is difficult because of its limited visibility in the archaeological record. The density of the early European population was probably low, and occupation sites may have been small. Few of the sites are likely to have been preserved, and even these may be particularly difficult to find. Most caves and rock shelters-which protect archaeological remains and are easy to identify as potential sites-erode away in a few hundred thousand years. The majority of the early European sites are buried in sediments deposited by streams, lakes, or springs.

The lack of hand axes presents a special problem for the European sites that antedate half a million years. Such tools are unmistakable products of the human hand, and their presence in later deposits-even in isolated settings-is firm evidence of human occupation. But prior to 500,000 years ago, Europeans were making simple pebble and flake tools that differed little from the original Oldowan industry [the earliest tools in human history]. These artifacts are often difficult to distinguish from naturally fractured rock, and they are frequently recovered from geologic contexts (such as high-energy stream deposits) likely to contain naturally chipped and broken cobbles and pebbles. As a consequence, most of the reported European sites dating to more than 500,000 years ago are highly problematic.
The primary purpose of the passage is to
Which of the following can be inferred from the passage about the people who colonized Europe after 500,000 years ago?
The passage implies which of the following about hand axes?
The passage supports which of the following statements about the tools used by Europeans prior to 500,000 years ago?
Although workers are eager to believe rumors that the manufacturer plans to invest in modernizing the local plant, the troubled auto company has made no public commitment that would ____________ the plant's future.
Many people remember a time when cutting-edge architects, who are these days treated like celebrities, had ____________ relationship with the public: for much of the 1960s, big new buildings in cities were often cause for hostility, not celebration.
In this otherwise ____________ study, the internal tensions resulting from the increasing integration of the United States with the world economy are simply mentioned rather than analyzed.
There is a vast disparity of computational power between mathematical ____________ like many of us and a mathematical prodigy like Ramanujan.
The argument depends on the assumption that

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