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question:Many homeowners regularly add commercial fertilizers to their lawns and gardens to maintain a healthy balance of nutrients in soil. The widely available commercial fertilizers contain only macronutrients -- namely, nitrogen, phosphorus, and potassium. To remain healthy in the long term, soil for lawns requires the presence of these macronutrients and also trace amounts of micronutrients such as zinc, iron, and copper, which are depleted when grass clippings are raked up rather than allowed to decay and return to the soil. Which one of the following can be properly inferred from the statements above? A: Widely available commercial fertilizers are not alone sufficient to maintain a healthy balance of nutrients in soil for lawns where grass clippings are not allowed to decay and return to the soil. B: Homeowners who rake up their grass clippings are unable to maintain the long-term health of the soil in their lawns and gardens. C: There is no single fertilizer that provides both the macronutrients and micronutrients necessary for maintaining soil's long-term health. D: For soil to remain healthy in the long term, it requires the regular addition of both commercial fertilizers and a source of micronutrients such as grass clippings that are allowed to decay and return to the soil. Choose A, B, C or D as your solution.
answer:D: For soil to remain healthy in the long term, it requires the regular addition of both commercial fertilizers and a source of micronutrients such as grass clippings that are allowed to decay and return to the soil.,D: For soil to remain healthy in the long term, it requires the regular addition of both commercial fertilizers and a source of micronutrients such as grass clippings that are allowed to decay and return to the soil.,A
question:A survey taken ten years ago of residents of area L showed that although living conditions were slightly below their country' s average, most residents of L reported general satisfaction with their living conditions. However, this year the same survey found that while living conditions are now about the same as the national average, most residents of L report general dissatisfaction with their living conditions. Which one of the following, if true, would most help to resolve the apparent conflict between the results of the surveys described above? A: Ten years ago the residents of area L were not aware that their living conditions were below the national average. B: Living conditions in an area generally improve only if residents perceive their situation as somehow in need of improvement. C: Optimal living conditions were established in the survey by taking into account governmental policies and public demands on three continents. D: Between the times that the two surveys were conducted, the average living conditions in L's country had substantially declined. Choose A, B, C or D as your solution.
answer:B: Living conditions in an area generally improve only if residents perceive their situation as somehow in need of improvement., D: Between the times that the two surveys were conducted, the average living conditions in L's country had substantially declined.,D
question:Manager: Although our corporation lists rules in an orientation booklet, few employees read the booklet carefully enough to familiarize themselves with all the rules. Lecturing employees for inadvertent rule violations often makes them resentful and less cooperative. Thus, to improve employee adherence to rules, we plan to issue gentle reminders about various rules in each issue of our weekly newsletter. Which of the following would it be most helpful to discover about the employees in the corporation in order to evaluate the likelihood that the plan will succeed? A: Whether most of them violate at least some rules with which they are familiar B: Whether most of them who inadvertently violate rules already feel resentful and uncooperative C: Whether most of them would usually read with sufficient care the portions of the weekly newsletter that are reminders of rules D: Whether most of them who regularly read the weekly newsletter are familiar with at least some rules Choose A, B, C or D as your solution.
answer:C,C, C: Whether most of them would usually read with sufficient care the portions of the weekly newsletter that are reminders of rules Understanding whether employees typically read the weekly newsletter and pay sufficient attention to the rule reminders is crucial to evaluating the likelihood of the plan's success. If employees do not read or pay attention to the newsletter, the gentle reminders will not be effective. Choices A, B, and D may provide some insight into employee behavior, but choice C is most directly related to the effectiveness of the proposed solution.
question:The prairie vole, a small North American grassland rodent, breeds year-round, and a group of voles living together consists primarily of an extended family, often including two or more litters. Voles commonly live in large groups from late autumn through winter; from spring through early autumn, however, most voles live in far smaller groups. The seasonal variation in group size can probably be explained by a seasonal variation in mortality among young voles. Which of the following, if true, provides the strongest support for the explanation offered? A: Prairie vole populations vary dramatically in size from year to year. B: It is in the spring and early summer that prairie vole communities generally contain the highest proportion of young voles. C: The prairie vole subsists primarily on broad-leaved plants that are abundant only in spring. D: Snakes, a major predator of young prairie voles, are active only from spring through early autumn. Choose A, B, C or D as your solution.
answer:B, D: Snakes, a major predator of young prairie voles, are active only from spring through early autumn. This option provides the strongest support for the explanation offered because it directly connects the seasonal variation in mortality among young voles to a specific factor that is present during certain seasons. In this case, the presence of an active snake population (a major predator of young prairie voles) from spring through early autumn could account for the increased mortality rate among young voles during these months, thereby contributing to the smaller group sizes observed during that period.,D