A．Prices for palm fruit fell between 1980 and 1984 following the rise in production and a concurrent fall in demand.
B．Imported trees are often more productive than native trees because the imported ones have left behind their pests and diseases in their native lands.
C．Rapid increases in productivity tend to deplete trees of nutrients needed for the development of the fruit-producing female flowers.
D．The weevil population in Asia remained at approximately the same level between 1980 and 1984.
E．Prior to 1980 another species of insect pollinated the Asian palm trees, but not as efficiently as the species of weevil that was introduced in 1980.

A．Many more desktop computers are sold each year in the United States market than are sold in the Swedish market.
B．The manufacturer does not want its competitors to become aware of the means by which the company has achieved this advance in technology.
C．Most business and scientific purchasers of desktop computers expect to replace such equipment eventually as better technology becomes available on the market.
D．An emphasis on the comparative safety of the new screen would call into question the safety of the many screens the manufacturer has already sold in the United States.
E．Concern has been expressed in the United States over the health effects of the large electromagnetic fields surrounding electric power lines.

A．The surveys questioned people who regularly watch prime-time television, and an innovative weekly primetime television series called "Wonders of Science" had been steadily winning viewers since its widely seen premiere in January 1992.
B．The surveys questioned college-educated adults, and a report called "The State of the Nation’s Schools." published in June 1992, noted an increase in students’ interest in science courses since 1982.
C．The surveys were conducted in a suburban shopping area near a company that ceased operation in April 1992 as a result of lawsuits arising from unexpected toxic effects of the company’s products.
D．Both survey forms were mailed to equally large samples of the population, after returning the 1991 survey forms, respondents were sent discount coupons for food products, and after returning the 1992 survey forms, respondents were sent a pamphlet on recycling.
E．The surveys questioned first-year college students across the country, and the people who did the questioning were all research scientists.

A．The neurons of the brain react less when a subject is trying to recognize patterns than when the subject is doing other kinds of reasoning.
B．Those who performed best in the experiment experienced more satisfaction when working with abstract patterns than did those who performed less well.
C．People who are better at abstract pattern recognition have more energy-efficient neural connections.
D．The energy expenditure of the subjects brains increases when a design that completes the initially recognized pattern is determined.
E．The task of completing a given design is more capable performed by athletes, whose energy expenditure is lower when they are at rest than is that of the general population.

A．When a pottery piece from any batch was broken during finishing, Stone Age people sometimes deliberately smashed the rest of that batch, perhaps to avert bad luck.
B．The composition of clay, which affects the durability of any pottery made from it, varies greatly from one area of the world to another.
C．Pottery was invented in the Stone Age, and techniques for making pottery were mastered well before those required for delicate ceramic work.
D．Stone Age potters drafted pottery figurines as frequently as they did ceramic pieces.
E．Many Stone Age rituals involved the destruction of a pottery figurine, perhaps as a sacrifice to the gods.

A.Major episodes of extinction can result from widespread environmental disturbances that affect numerous different species.
B.Certain extinction episodes selectively affect organisms with particular sets of characteristics unique to their species.
C.Some species become extinct because of accumulated gradual changes in their local environments.
D.In geologically recent times, for which there is no fossil record, human intervention has changed the pattern of extinction.
E.Species that are widely dispersed are the least likely to become extinct.

A．Fewer food products are packaged in nonrecyclable plasticstoday than were so packaged a year ago.
B．The new ordinance affects only plastic food packaging and not other products packaged in plastic, many of which are sold in Gorenton.
C．Grocery and other stores in nearby suburban areas patronized by many Gorenton residents are unaffected by the new ordinance.
D．Many food products formerly packaged in nonrecyclable plastics are now specially packaged in recyclable plastic before being shipped so that they can be sold in Gorenton.
E．The total amount of both Gorenton’s trash and its plastic waste grew considerably over the past year.

A．The Pazyryk tombs were all robbed during ancient times, but breakage of the tombs’ seals allowed the seepage of water, which soon froze permanently, thereby preserving the tombs’ remaining artifacts.
B．The Pazyryk Valley, surrounded by extremely high mountains, has a distinctive yearly pattern of rainfall, and so trees growing in the Pazyryk Valley have annual rings that are quite distinct from trees growing in nearby valleys.
C．Each log in the Pazyryk tombs has among its rings a distinctive sequence of twelve annual rings representing six drought years followed by three rainy years and three more drought years.
D．The archaeologists determined that the youngest tree used in any of the tombs was 90 years old and that the oldest tree was 450 years old.
E．All of the Pazyryk tombs contained cultural artifacts that can be dated to roughly 2300 years ago.

A．The banks have reassessed the income potential of the completed project and have concluded that total income general would be less than total interest due on the old plus the needed new loans.
B．The banks have identified several other projects that offer faster repayment of the principal if loans are approved now to get those projects started.
C．The banks had agreed with the borrowers that the construction loans would be secured by the completed project.
D．The cost overruns were largely due to unforeseeable problems that arose in the most difficult phase of the construction work.
E．The project stimulated the development and refinement of several new construction techniques, which will make it easier and cheaper to carry out similar projects in the future.

A．The term manic-depressive refers to a wider range of mentally ill patients in Great Britain than it does in the United States.
B．The admission rate in the United States includes those individuals who visit clinics for the first time as well as those who are admitted directly to hospitals.
C．A small percentage of patients diagnosed as manic-depressive in Great Britain are admitted to private nursing homes rather than hospitals.
D．The variety of training institutions in psychology in the United States is greater than in Great Britain, reflecting the variety of schools of psychology that have developed in the United States.
E．Seeking professional assistance for mental health problems no longer carries a social stigma in the United States, as it once did.