Passage One F}36
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Questions1—8 are based on the following passage: E"qFXA>
In the two decades between 1910 and 1930, over ten percent of the Black population of the United States left the South, where the preponderance of the Black population had been located, and migrated to northern states, with the largest number moving, it is claimed, between 1916 and 1918. It has been frequently assumed, but not proved, that the majority of the migrants in what has come to be called the Great Migration came from rural areas and were motivated by two concurrent factors: the collapse of the cotton industry following the boll weevil infestation, which began in 1898, and increased demand in the North for labor following the cessation of European immigration caused by the outbreak of the First World War in 1914. This assumption has led to the conclusion that the migrants’ subsequent lack of economic mobility in the North is tied to rural background, a background that implies unfamiliarity with urban living and a lack of industrial skills. 7C7>y/uS
But the question of who actually left the South has never been rigorously investigated. Although numerous investigations document an exodus from rural southern areas to southern cities prior to the Great Migration, no one has considered whether the same migrants then moved on to northern cities. In 1910 over 600,000 Black workers, or ten percent of the Black work force, reported themselves to be engaged in “manufacturing and mechanical pursuits,” the federal census category encompassing the entire industrial sector. The Great Migration could easily have been made up entirely of this group and their families. It is perhaps surprising to argue that an employed population could be enticed to move, but an explanation lies in the labor conditions then prevalent in the South. /7/0x ./{
About thirty-five percent of the urban Black population in the South was engaged in skilled trades. Some were from the old artisan class of slavery—blacksmiths, masons, carpenters—which had had a monopoly of certain trades, but they were gradually being pushed out by competition, mechanization, and obsolescence. The remaining sixty-five percent, more recently urbanized, worked in newly developed industries—tobacco, lumber, coal and iron manufacture, and railroads. Wages in the South, however, were low, and Black workers were aware, through labor recruiters and the Black press, that they could earn more even as unskilled workers in the North than they could as artisans in the South. After the boll weevil infestation, urban Black workers faced competition from the continuing influx of both Black and White rural workers, who were driven to undercut the wages formerly paid for industrial fobs. Thus, a move north would be seen as advantageous to a group that was already urbanized and steadily employed, and the easy conclusion tying their subsequent economic problems in the North to their rural background comes into question. xq[Yg15d%
1.The author indicates explicitly that which of the following records has been a source of information in her investigation? ^:KO_{3E
(A) United States Immigration Service reports from 1914 to 1930. W2]TRO
(B) Payrolls of southern manufacturing firms between 1910 and 1930. =lp1Z>
(C) The volume of cotton exports between 1898 and 1910. /Vww?9U;
(D) The federal census of 1910.
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2.In the passage, the author anticipates which of the following as a possible objection to her argument? r2\c'9uH
It is uncertain how many people actually migrated during the Great Migration. eGL<vX
The eventual economic status of the Great Migration migrants has not been adequately traced. 94/BG0
It is not likely that people with stead jobs would have reason to move to another area of the country. 7K;!iX<d
It is not true that the term “manufacturing and mechanical pursuits” actually encompasses the entire industrial sector. Kct@87z
3.According to the passage, which of the following is true of wages in southern cities in 1910? Z7a945Jd
(A) They were being pushed lower as a result of increased competition. 4_^[=
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(B) They had begun to rise so that southern industry could attract rural workers.
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(C) They had increased for skilled workers but decreased for unskilled workers. $B (kZ
(D) They had increased in large southern cities but decreased in small southern cities. =&nW~<- v
4.The author cites each of the following as possible influences in a Black worker’s decision to migrate north in the Great Migration EXCEPT_________. f&KdlpxKv
(A) wage levels in northern cities -ijC_`>
(B) labor recruiters L] %l51U
(C) competition from rural workers BuOgOYh9
(D) voting rights in northern states EGVM)ur
5.It can be inferred from the passage that the “easy conclusion” mentioned in line 16 of the last paragraph is based on which of the following assumptions? |nUl\WRd\
(A) People who migrate from rural areas to large cities usually do so for economic reasons. }G
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(B) Most people who leave rural areas to take jobs in cities return to rural areas as soon as it is neZ.`"LV
financially possible for them to do so.
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(C) People with rural backgrounds are less likely to succeed economically in cities than are those r6Aneg7
with urban backgrounds. T{v>-xBRy
(D) Most people who were once skilled workers are not willing to work as unskilled workers. (Z]HX@"{J
6.The primary purpose of the passage is to ________.
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Support an alternative to an accepted methodology _}xd}QW
Present evidence that resolves a contradiction i1lBto[
Introduce a recently discovered source of information +0Q,vK#j^
Challenge a widely accepted explanation yLE7>48
7. According to information in the passage, which of the following is a correct sequence of groups of workers, from highest paid to lowest paid, in the period between 1910 and 1930? as yZe
Artisans in the North; artisans in the Sough; unskilled workers in the North; unskilled workers in the south. *cuuz
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Artisans in the North and South; unskilled workers in the North; unskilled workers in the South. 4
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Artisans in the North; unskilled workers in the North; artisans in the South. =@&cH Y
Artisans in the North and South; unskilled urban workers in the North; unskilled rural workers in the South.
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8.The material in the passage would be most relevant to a long discussion of which of the following topics? dO> VwP
The reasons for the subsequent economic difficulties of those who participated in the Great Migration. t_^X$pL
The effect of migration on the regional economies of the United States following the First World War. 8Me:Yp_Xt
The transition from a rural to an urban existence for those who migrated in the Great Migration. |1b_*G4|
The transformation of the agricultural South following the boll weevil infestation. K.<.cJE
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Passage Two !* Ti}oIo&
Question 9—17 are based on the following passage: gxz-R?.
Prior to 1975, union efforts to organize public-sector clerical worker, most of whom are women, were somewhat limited. The factors favoring unionization drives seem to have been either the presence of large numbers of workers, as in New York City, to make it worth the effort, or the concentration of small numbers in one or two locations, such as a hospital, to make it relatively easy. Receptivity to unionization on the workers, part was also a consideration, but when there were large numbers involved or the clerical workers were the only unorganized group in a jurisdiction, the multioccupational unions would often try to organize them regardless of the workers’ initial receptivity. The strategic reasoning was based, first, on the concern that politicians and administrators might play off unionized against nonunionized workers, and, second, on the conviction that a fully unionized public work force meant power, both at the bargaining table and in the legislature. In localities where clerical workers were few in number, were scattered in several workplaces, and expressed no interest in being organized, unions more often than not ignored them in the pre-1975 period. B~]5$-
But since the mid-1970’s, a different strategy has emerged. In 1977,34 percent of government clerical workers were represented by a labor organization, compared with 46percent of government professionals, 44 percent of government blue-collar workers, and 41 percent of government service workers. Since then, however, the biggest increases in public-sector unionization have been among clerical workers. Between 1977 and 1980, the number of unionized government workers in blue-collar and service occupations increased only about 1.5 percent, while in the white-collar occupations the increase was 20 percent and among clerical workers in particular, the increase was 22 percent. N'r3`8tS
What accounts for this upsurge in unionization among clerical workers? First, more women have entered the work force in the past few years, and more of them plan to remain working until retirement age. Consequently, they are probably more concerned than their predecessors were about job security and economic benefits. Also, the women’s movement has succeeded in legitimizing the economic and political activism of women of their own behalf, thereby producing a more positive attitude toward unions. The absence of any comparable increase in unionization among private-sector clerical worker, however, identifies the primary catalyst — the structural change in the multioccupational public-sector unions themselves. Over the past twenty years, the occupational distribution in these unions has been steadily shifting from predominantly blue-collar to predominantly white-collar. Because there are far more women in white-collar jobs, an increase in the proportion of female members has accompanied the occupational shift and has altered union policy-making in favor of organizing women and addressing women’s issues. 3$.deYa$R
9.According to the passage, the public-sector workers who were most likely to belong to unions in 1977 were______. &,A64y
(A) professionals N{
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(B) managers 61puqiGG^
(C) clerical workers 'o|30LzYgQ
(D) service workers \$0F-=w`8
10.The author cites union efforts to achieve a fully unionized work force (line 11—15) in order to account for why______. )[0T16
(A) politicians might try to oppose public-sector union organizing }bY;q-
(B) public-sector unions have recently focused on organizing women 1)
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(C) early organizing efforts often focused on areas where there were large numbers of workers 7K)6^r^
(D) unions sometimes tried to organize workers regardless of the workers’ initial interest in unionization 3vcO!6Z5
11.The author’s claim that, since the mid-1970’s, a new strategy has emerged in the unionization of public-sector clerical workers (line 19) would be strengthened if the author______. Eskb9^A
(A) described more fully the attitudes of clerical workers toward labor unions 0/S_e)U
(B) compared the organizing strategies employed by private-sector unions lY|Jr{+Ln
(C) explained why politicians and administrators sometimes oppose unionization of clerical workers @-UL`+
(D) showed that the factors that favored unionization drives among these workers prior to 1975 have decreased in importance a=M\MZK>
12.According to the passage, in the period prior to 1975, each of the following considerations helped determine whether a union would attempt to organize a certain group of clerical workers EXCEPT______. Wu4Lxv]B4
(A) the number of clerical workers in that group kOIt(e
(B) the number of women among the clerical workers in that group \j&^aAp r
(C) whether the clerical workers in that area were concentrated in one work-place or scattered over several work-places 7AYd!n&S
(D) the degree to which the clerical workers in that group were interested in unionization :0s]U_h
13.The author states that which of the following is a consequence of the women’s movement of recent years? . e=C{
(A) An increase in the number of women entering the work force. f B9;_z
(B) A structural change in multioccupational public-sector unions. yAoe51h?
(C) A more positive attitude on the part of women toward unions. `rf_7
(D) An increase in the proportion of clerical workers that are women. ByCnD
14.The main concern of the passage is to ______. LX^u_Iu
(A) advocate particular strategies for future efforts to organize certain workers into labor unions H54R8O$
(B) explain differences in the unionized proportions of various groups of public-sector workers r*Yi1j/
(C) evaluate the effectiveness of certain kinks of labor unions that represent public-sector workers fk_o@
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(D) analyzed and explain an increase in unionization among a certain category of workers _YF%V;X
15.The author implies that if the increase in the number of women in the work force and the impact of the women’s movement were the main causes of the rise in unionization of public-sector clerical workers, then______. e^.Fa59
more women would hold administrative positions in unions NH+(?TN
more women who hold political offices would have positive attitudes to ward labor unions 7b<yVP;{
there would be an equivalent rise in unionization of private-sector clerical workers wE~V]bmtW
unions would have shown more interest than they have in organizing women m9/}~Y#k
16.The author suggests that it would be disadvantageous to a union if ______. ;3'.C~
(A) many workers in the locality were not unionized 0qX3v<+[6
(B) the union contributed to political campaigns \hB5@e4i2
(C) the union included only public-sector workers hZ.Z3`v70
(D) the union included workers from several jurisdictions ;<leKcvhQ&
17.The author implies that, in comparison with working women today, women working in the years prior to the mid-1970’s showed a greater tendency to ______. !Y-98<|b
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(A) prefer smaller workplaces l5"OIq
(B) express a positive attitude toward labor unions *8LMn
(C) maximize job security and economic benefits gvLf|+m
(D) quit working prior of retirement age ]C) 4
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Passage Three zzxGAVu
Questions 18—24 are based on the following passage: |o\8
Studies of the Weddell seal in the laboratory have described the physiological mechanisms that allow the seal to cope with the extreme oxygen deprivation that occurs during its longest dives, which can extend 500 meters below the ocean’s surface and last for over 70 minutes. Recent field studies, however, suggest that during more typical dives in the wild, this seal’s physiological behavior is different. &uO%_6J
In the laboratory, when the seal dives below the surface of the water and stops breathing, its heart beats more slowly, requiring less oxygen and its arteries become constricted, ensuring that the seal’s blood remains concentrated near those organs most crucial to its ability to navigate underwater. The seal essentially shuts off the flow of blood to other organs, which either stop functioning until the seal surfaces or switch to an anaerobic (oxygen-independent) metabolism. The latter results in the production of large amounts of lactic acid which can adversely affect the PH of the seal’s blood but since the anaerobic metabolism occurs only in those tissues which have been isolated from the seal’s blood supply, the lactic acid is released into the seal’s blood only after the seal surfaces, when the lungs, liver, and other organs quickly clear the acid from the seal’s blood stream. XHK70: i
Recent field studies, however, reveal that on dives in the wild, the seal usually heads directly for its prey and returns to the surface in less than twenty minutes. The absence of high levels of lactic acid in the seal’s blood after such dives suggests that during them, the seal’s organs do not resort to the anaerobic metabolism observed in the laboratory, but are supplied with oxygen from the blood. The seal’s longer excursions underwater, during which it appears to be either exploring distant routes or evading a predator, do evoke the diving response seen in the laboratory. But why do the seal’s laboratory dives always evoke this response, regardless of their length or depth? Some biologists speculate that because in laboratory dives the seal is forcibly submerged, it does not know how long it will remain underwater and so prepares for the worst. nJo`B4'U
18.The passage provides information to support which of the following generalizations? rwI
Observations of animals’ physiological behavior in the wild are not reliable unless verified by laboratory studies. ~-I+9F
It is generally less difficult to observe the physiological behavior of an animal in the wild than in the laboratory. 3? HhG
The level of lactic acid in an animal’s blood is likely to be higher when it is searching for prey than when its evading predators. 62Z#YQ}x
The physiological behavior of animals in a laboratory setting is not always consistent with their physiological behavior in the wild. )Q.>rX,F
19.It can be inferred from the passage that by describing the Weddell seal as preparing “for the worst” lines 31—32, biologists mean that it ______. [<6S%s
prepares to remain underwater for no longer than twenty minutes -:na:Vsi
exhibits physiological behavior similar to that which characterizes dives in which it heads directly for its prey %T~ig[GstX
exhibits physiological behavior similar to that which characterizes its longest dives in the wild o|$AyS{1
begins to exhibit predatory behavior #E&80#Z5
20.The passage suggests that during laboratory dives. The PH of the Weddell seal’s blood is not adversely affected by production of lactic acid because______. P
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(A) only those organs that are essential to the seal’s ability to navigate under-water revert to an anaerobic mechanism. 8p: j&F
(B) the seal typically reverts to an anaerobic metabolism only at the very end of the dive ](s'L8(x
(C) organs that revert to an anaerobic metabolism are temporarily isolated from the seal’s bloodstream 3nhXZOO1
(D) the seal remains submerged for only short periods of time 'JRvP!]
21.Which of the following best summarizes the main point of the passage? [xGf,;Z
(A) Recent field studies have indicated that descriptions of the physiological behavior of the Weddell seal during laboratory dives are not applicable to its most typical dives in the wild. oomT)gO 6*
(B) The Weddell seal has developed a number of unique mechanisms that enable it to remain submerged at depths of up to 500 meters for up to 70 minutes. ,.7*Hpa
(C) The results of recent field studies have made it necessary for biologists to revise previous perceptions of how the Weddell seal behaves physiologically during its longest dives in the wild. ;t|Ii8Ne
(D) How the Weddell seal responds to oxygen deprivation during its longest dives appears to depend on whether the seal is searching for prey or avoiding predators during such dives. P3=W|81e
22.According to the author, which of the following is true of the laboratory studis mentioned in line 1? =,UWX3`f
(A) They present an oversimplified account of mechanisms that the Weddell seal relies on during its longest dives in the wild.
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(B) They provide evidence that undermines the view that the Weddell seal relies on an anaerobic metabolism during its in the wild. 8]U{;|';
(C) They are based on the assumption that Weddell seals rarely spend more than twenty minutes underwater on a typical dive in the wild. 1fZ(l"
(D) They provide an accurate account of the physiological behavior of Weddell seals during those dives in the wild in which they are either evading predators or exploring distant routes. Y9&,t\ q
23.The author cites which of the following as characteristic of the Weddell seal’s physiological behavior during dives observed in the laboratory? o}* hY"&
I. A decrease in the rate at which the seal’s heart beats. s;6CExH
II. A constriction of the seal’s arteries. lp(8E6
III. A decrease in the levels of lactic acid in the seal’s blood. |\7
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IV. A temporary halt in the functioning of certain organs. L2[f]J%
(A) I and III only }n4V|f-
(B) I and IV only (aH'h1,G
(C) II and III only z}MP)|aH:
(D) I, II, and IV only "-+\R}q$
24.The passage suggests that because Weddell seals are forcibly submerged during laboratory dives, they do which of the following? ;{U@qQD7
Exhibit the physiological responses that are characteristic of the longer dives they undertake in the wild. 5nKj
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Cope whit oxygen deprivation less effectively than do on typical dives in the wild. "-vW
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Produce smaller amounts of lactic acid than they do on typical dives in the wild. *U
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Navigate less effectively than they do on typical dives in the wild. }<9cL'
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Passage Four 4X+ifZO
Questions 25—30 are based on the following passage: '.81zpff
Australian researchers have discovered electroreceptors (sensory organs designed to respond to electrical fields) clustered at the tip of the spiny anteater’s snout. The researchers made this discovery by exposing small areas of the snout to extremely weak electrical fields and recording the transmission of resulting nervous activity to the brain. While it is true that tactile receptors, another kind of sensory organ on the anteater’s snout, can also respond to electrical stimuli, such receptors do so only in response to electrical field strengths about 1,000 times greater than those known to excite electroreceptors. 1$p2}Bf{n
Having discovered the electroreceptors, researchers are now investigating how anteaters utilize such a sophisticated sensory system. In one behavioral experiment, researchers successfully trained an anteater to distinguish between two troughs of water, one with a weak electrical field and the other with none. Such evidence is consistent with researcher’s hypothesis that anteaters use electroreceptors to detect electrical signals given off by prey; however, researchers as yet have been unable to detect electrical signals emanating from termite mounds, where the favorite food of anteaters live. Still, researchers have observed anteaters breaking into a nest of ants at an oblique angle and quickly locating nesting chambers. This ability quickly to locate unseen prey suggests, according to the researchers, that the anteaters were using their electroreceptors to locate the nesting chambers. F!]lU`z)=
25.According to the passage, which of the following is a characteristic that distinguishes electroreceptors from tactile receptors? 4UW_Do
(A) The manner in which electroreceptors respond to electrical stimuli. \
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(B) The tendency of electroreceptors to be found in clusters. jhb6T ?}
(C) The unusual locations in which electroreceptors are found in most species. id2j7|$,
(D) The amount of electrical stimulation required to excite electroreceptors. =9fajRFTt
26.Which of the following can be inferred about the experiment described in the first paragraph? ".<DAs j
(A) Researchers had difficulty verifying the existence of electroreceptors in the anteater because electroreceptors respond to such a narrow range of electrical field strengths. t3&LO~Ye
(B) Researchers found that the level of nervous activity in the anteater’s brain increased dramatically as the strength of the electrical stimulus was increased. 5a hVeY
(C) Researchers found that some areas of the anteater’s snout were not sensitive to a weak electrical stimulus. &