LSAT-Section-2-Reading-Comprehension – Section Two : Reading Comprehension

Tribal communities in North America believe that their traditional languages are valuable resources that must be maintained- However, these traditional languages can fall into disuse when some of the effects of the majority culture on tribal life serve as barriers between a community and its traditional forms of social, economic, or spiritual interaction. In some communities the barrier has been overcome because people have recognized that language loss is serious and have taken action to prevent it, primarily through community self-teaching.

Before any community can systematically and formally teach a traditional language to its younger members, it must first document the language's grammar; for example, a group of Northern Utes spent two years conducting a thorough analysis and classification of Northern Ute linguistic structures. The grammatical information is then arranged in sequence from the simpler to the more complex types of usage, and methods are devised to present the sequence in ways that will be most useful and appropriate to the culture.

Certain obstacles can stand in the way of developing these teaching methods. One is the difficulty a community may encounter when it. attempts to write down elements (particularly the spellings of words) of a language that has been primarily oral for centuries, as is often the case with traditional languages. Sometimes this difficulty can simply be a matter of the lack of acceptable written equivalents for certain sounds in the traditional language: problems arise because of an insistence that every sound in the language have a unique written equivalent – a desirable but ultimately frustrating condition that no written language has ever fully satisfied.

Another obstacle is dialect. There may be many language traditions in a particular community; which one is to be written down and taught? The Northern Utes decided not to standardize their language, agreeing that various phonetic spellings of words would be accepted as long as their meanings were clear. Although this troubled some community members who favored Western notions of standard language writing or whose training in Western-style linguistics was especially rigid, the lack of standard orthography made sense in the context of the community's needs. Within a year after the adoption of instruction in the Northern Ute language, even elementary school children could write and speak it effectively.

It has been argued that the attempt to write down traditional languages is misguided and unnecessary; after all, in many cases these languages have been transmitted in their oral form since their origins. Defenders of the practice counter that they are writing down their languages precisely because of a general decline in oral traditions, but they concede that languages could be preserved in their oral form if a community made every effort to eschew aspects of the majority culture that make this preservation difficult.

Based on the passage, which one of the following appears to be a principle guiding the actions of those attempting to preserve their traditional languages?

Scientists have long known that the soft surface of the bill of the platypus is perforated with openings that contain sensitive nerve endings. Only recently, however, have biologists concluded on the basis of new evidence that the animal uses its bill to locate its prey while underwater, a conclusion suggested by the fact that the animal's eyes, ears, and nostrils are sealed when it is submerged. The new evidence comes from neurophysiological studies, which have recently revealed that within the pores on the bill there are two kinds of sensory receptors: mechanoreceptors, which are tiny pushrods that respond to tactile pressure, and electroreceptors, which respond to weak electrical fields. Having discovered that tactile stimulation of the pushrods sends nerve impulses to the brain, where they evoke an electric potential over an area of the neocortex much larger than the one stimulated by input from the limbs, eyes, and ears, Bohringer concluded that the bill must be the primary sensory organ for the platypus. Her finding-was supported by studies showing that the bill is extraordinarily sensitive to tactile stimulation: stimulation with a fine glass stylus sent a signal by way of the fifth cranial nerve to the neocortex and from there to the motor cortex. Presumably nerve impulses from the motor cortex then induced a snapping movement of the bill. But Bohringer's investigations did not explain how the animal locates its prey at a distance.

Scheich's neurophysiological studies contribute to solving this mystery. His initial work showed that when a platypus feeds, it swims along, steadily wagging its bill from side to side until prey is encountered. It thereupon switches to searching behavior, characterized by erratic movements of the bill over a small area at the bottom of a body of water, which is followed by homing in on the object and seizing it. In order to determine how the animal senses prey and then distinguishes it from other objects on the bottom, Scheich hypothesized that a sensory system based on electroreception similar to that found in sharks might exist in the platypus. In further experiments he found he could trigger the switch from patrolling to searching behavior in the platypus by creating a dipole electric field in the water with the aid of a small 1.5-volt battery. The platypus, sensitive to the weak electric current that was created, rapidly oriented toward the battery at a distance of 10 centimeters and sometimes as much as 30 centimeters. Once the battery was detected, the platypus would inevitably attack it as if it were food. Scheich then discovered that the tail flicks of freshwater shrimp, a common prey of the platypus, also produce weak electric fields and elicit an identical response. Scheich and his colleagues believe that it is reasonable to assume that all the invertebrates on which the platypus feed must produce electric fields.

The primary purpose of the passage is to

Scientists have long known that the soft surface of the bill of the platypus is perforated with openings that contain sensitive nerve endings. Only recently, however, have biologists concluded on the basis of new evidence that the animal uses its bill to locate its prey while underwater, a conclusion suggested by the fact that the animal's eyes, ears, and nostrils are sealed when it is submerged. The new evidence comes from neurophysiological studies, which have recently revealed that within the pores on the bill there are two kinds of sensory receptors: mechanoreceptors, which are tiny pushrods that respond to tactile pressure, and electroreceptors, which respond to weak electrical fields. Having discovered that tactile stimulation of the pushrods sends nerve impulses to the brain, where they evoke an electric potential over an area of the neocortex much larger than the one stimulated by input from the limbs, eyes, and ears, Bohringer concluded that the bill must be the primary sensory organ for the platypus. Her finding-was supported by studies showing that the bill is extraordinarily sensitive to tactile stimulation: stimulation with a fine glass stylus sent a signal by way of the fifth cranial nerve to the neocortex and from there to the motor cortex. Presumably nerve impulses from the motor cortex then induced a snapping movement of the bill. But Bohringer's investigations did not explain how the animal locates its prey at a distance.

Scheich's neurophysiological studies contribute to solving this mystery. His initial work showed that when a platypus feeds, it swims along, steadily wagging its bill from side to side until prey is encountered. It thereupon switches to searching behavior, characterized by erratic movements of the bill over a small area at the bottom of a body of water, which is followed by homing in on the object and seizing it. In order to determine how the animal senses prey and then distinguishes it from other objects on the bottom, Scheich hypothesized that a sensory system based on electroreception similar to that found in sharks might exist in the platypus. In further experiments he found he could trigger the switch from patrolling to searching behavior in the platypus by creating a dipole electric field in the water with the aid of a small 1.5-volt battery. The platypus, sensitive to the weak electric current that was created, rapidly oriented toward the battery at a distance of 10 centimeters and sometimes as much as 30 centimeters. Once the battery was detected, the platypus would inevitably attack it as if it were food. Scheich then discovered that the tail flicks of freshwater shrimp, a common prey of the platypus, also produce weak electric fields and elicit an identical response. Scheich and his colleagues believe that it is reasonable to assume that all the invertebrates on which the platypus feed must produce electric fields.

Which one of the following statements best expresses the main idea of the passage?