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Question 1

Recent studies of the gender gap in the history of United States politics tend to focus on candidate choice rather than on registration and turnout. This shift in focus away from gender inequality in political participation may be due to the finding in several studies of voting behavior in the United States that since
1980. differences in rates of registration and voting between men and women are not statistically significant after controlling for traditional predictors of participation. However. Fullerton and Stern argue that researchers have overlooked the substantial gender gap in registration and voting in the South. While the gender gap in participation virtually disappeared outside the South by the 1950s, substantial gender differences persisted in the South throughout the 1950s and 1960s, only beginning to decline in the 1970s.
The passage is primarily concerned with

A. confirming the merits of a claim
B. explaining the reasons for a change
C. establishing the chronology of a transition
D. discussing a perceived oversight
E. evaluating an underlying assumption

Question 2

She constantly_________herself for not living up to her own ideals-for not working hard enough, or not having motives that were pure enough.

A. deluded
B. exalted
C. coddled
D. mollified
E. excoriated

Question 3

Recent research has questioned the long-standing view of pearly mussels as exclusively suspension feeders (animals that strain suspended particles from water) that subsist on phytoplankton (mostly algae). Early studies of mussel feeding were based on analyses of gut contents, a method that has three weaknesses. First, material in mucus-bound gut contents is difficult to identify and quantify. Second, material found in the gut may pass undigested out of the mussel, not contributing to its nutrition. Finally, examination of gut contents offers limited insight into the mechanisms and behaviors by which mussels acquire food. Modem studies suggest that pearly mussels feed on more than just algae and may use other means than suspension feeding. Pedal feeding (sweeping up edible material with a muscular structure called the foot) has been observed in juvenile pearly mussels.
Besides the phytoplankton pearly mussels capture from the water column, their guts also contain small animals, protozoans, and detritus (nonliving particulate organic material). Recent studies show that mussels can capture and assimilate bacteria as well, a potentially important source of food in many fresh waters.
Another potential source of food for mussels is dissolved organic matter. Early studies showing that pearly mussels could take up simple organic compounds were largely discounted because such labile (unstable) compounds are rarely abundant in nature. Nevertheless, recent work on other bivalves suggests that dissolved organic matter may be a significant source of nutrition.
Of this complex mix of materials that pearly mussels acquire, what is actually required and assimilated?
Stable-isotope analyses of mussels taken from nature and of captive-reared mussels are beginning to offer some insight into this question. Nichols and Garling showed that pearly mussels in a small river were omnivorous, subsisting mainly on particles less than 2S micrometers in diameter, including algae, detritus, and bacteria. Bacterially derived carbon was apparently the primary source of soft-tissue carbon. However, bacteria alone cannot support mussel growth, because they lack the necessary long-chain fatty acids and sterols and are deficient in some amino acids. Bacteria may supplement other food resources, provide growth factors, or be the primary food In habitats such as headwater streams, where phytoplankton is scarce. Juvenile mussels have been most successfully reared m the laboratory on diets containing algae high in polyunsaturated fatty acids. Thus, it appears that the pearly mussel diet in nature may consist of algae, bacteria, detritus, and small animals and that at least some algae and bacteria may be required as a source of essential biochemicals.
Which of the following can be inferred about the "recent research?

A. It has invalidated researchers' questions about what pearly mussels eat.
B. It has revealed little about the mechanisms and behavior by which pearly mussels acquire food.
C. Little of it has been conducted on mussels in their natural habitats.
D. Some of it has produced findings that overturn earlier assumptions about pearly mussels' competition for food.
E. Some of it has been conducted by methods other than analysis of gut contents.

Question 4

Exhibit.

A. The relationship cannot be determined from the information given.
B. The two quantities are equal.
C. Quantity B is greater.
D. Quantity A is greater.

Question 5

The units digit of 7 is v. and the units digit of What is the value of the product xy

Solutions: