Until the mid-20th century, scientists believed that the chest cavity would implode at around 115 feet. Water pressure, they argued, reaches 65 pounds per square inch at that depth, which is enough to shrink lungs to the size of grapefruits and collapse rib cages like empty soda cans. Their theory went out the window in the 1950’s and early 1960’s, however, when divers like Enzo Maiorca returned from beyond 115-feet with rib cages intact. We now know that water pressure forces blood vessels in the chest to swell, filling the void left by the lungs with an incompressible fluid. Among the dangers of free diving, the most disconcerting is shallow-water blackout—the brains frightening tendency to shut down within 15 feet of the surface during the ascent. As you descend, water pressure squeezes your lungs, condensing the oxygen and giving you what feels like a second breath. During the return trip, however, your lungs re-expand, dissipating whats left of your oxygen. If levels drop too low, not enough will move into the bloodstream, and the lights go out. Fortunately, the body’s laryngospasm reflex kicks in to tighten the throat and keep water out for up to a minute—just enough time for your dive buddy to drag you to the surface, tilt your head back, and beg, “Breathe, baby.” Knowing Johnston will be there watching my eyes as I ascend (seeing them roll back in the head is a red flag), I dip below the surface. Staying in the syringe—dive speak for a tight hydrodynamic column—I kick down to 30 feet, my point of neutral buoyancy, and then sink effortlessly to the bottom. I feel good—surprisingly good—thanks to the densely packed oxygen molecules in my lungs. Lingering a moment, I peer up at the mirrored surface that separates this liquid world from mine. Diving to 55 feet was no sweat. I figure I could dive twice that with a little practice, reaching what scientists thought, not 50 years ago, was the body’s depth limit. Today, however, that boundary has been pushed to at least 531 feet (the current no-limits world record), which begs the question: Just how deep can humans go? “We don’t know that yet,” says Lundgren, adding ominously. “But one day someone will find out.”

Which of the following is true in respect of the effect of water pressure on humans?

Using infant mortality as a key indicator of the status of children, we now begin to have the broad features of a hypothesis as to the causes of higher or lower mortality rates. One aspect is the complex of factors involving the access of mothers to trained personnel and other facilities for child delivery, the nutritional status of pregnant and nursing mothers and the quality of health care and nourishment which babies receive. The other aspect, indicated by rural-urban differentials, is the possible importance of human settlement patterns in relation to the availability of health care and related facilities such as potable water, excreta disposal systems, etc. Thus, in a special sense, it is much cheaper to make health and other basic services available to a community when it is densely settled rather than widely dispersed. It is possible to argue, however, that both these sets of factors are closely related to a third one, namely, income levels. Poorer mothers and babies have less access to health-care facilities and nourishment than those who are better off; urban communities are on an average much better off than rural communities. That economic condition plays a crucial role in determining the status of both mother and child, is beyond dispute. But the question really is whether this is the only decisive factor or whether factors such as the availability of medical facilities, healthcare programs, and nutritional programs have an independent role. If so then the settlement patterns which affect service delivery to the mother and child target groups become a relevant consideration. These are clearly issues of some importance for policy and program planning.

Which among the following statements are correct?

When we accept the evidence of our unaided eyes and describe the Sun as a yellow star, we have summed up the most important single fact about it-at this moment in time. It appears probable, however, that sunlight will be the color we know for only a negligibly small part of the Sun’s history. Stars, like individuals, age and change. As we look out into space, We see around us stars at all stages of evolution. There are faint blood-red dwarfs so cool that their surface temperature is a mere 4,000 degrees Fahrenheit, there are searing ghosts blazing at 100, 000 degrees Fahrenheit and almost too hot to be seen, for the great part of their radiation is in the invisible ultraviolet range. Obviously, the “daylight” produced by any star depends on its temperature; today(and for ages to come) our Sun is at about 10,000 degrees Fahrenheit, and this means that most of the Sun’s light is concentrated in the yellow band of the spectrum, falling slowly in intensity toward both the longer and shorter light waves. That yellow “hump” will shift as the Sun evolves, and the light of day will change accordingly. It is natural to assume that as the Sun grows older, and uses up its hydrogen fuel which it is now doing at the spanking rate of half a billion tons a second- it will become steadily colder and redder.

Which of the following statements can be supported by this text?

The Western alphabet, which is used in Europe, the Americas, Africa, Australia and New Zealand as well as in other countries, originated in the Middle East. The people who gave the world this alphabet were the Phoenicians, a people who established colonies all over the Mediterranean, including Carthage in Africa and Gades in Spain. In their alphabet, the letters were represented by little pictures which represented sounds. The Phoenician A was Aleph, which means “bull”. and it was made from a little picture of a bull’s head. The letter B was Beth which meant “house”, and showed the round-roofed buildings which you can still see today in Syria. The Phoenicians had contact with another nation of sailors, the Greeks, with whom they fought and traded. The Greeks also started to use the Phoenician alphabet. They changed the names so aleph and beth became alpha and beta. The shapes of the letters are the same but they have been turned sideways. Of course, the first two letters of the alphabet give it its name. Over the years there have been changes. Latin developed an alphabet with some different letters to the Greeks, and other letters have been added since. But really westerners are using the same system of writing which has served them so well for thousands of years.

Which of the following are true statements in accordance with the information given in the above passage?

In terrestrial affairs we think of “big” as being complicated; a city is more intricate than a village, an ocean more complicated than a puddle. For the universe, the reverse seems to be the case bigger is simpler Galaxies have some puzzling features, but on the whole, they are scarcely more complicated than the stars that compose them Beyond the galaxies, in the hierarchy of the cosmos, there are clusters of galaxies; these clusters are loosely bound by the gravity of their largest members and tend to look very much the same in all directions. Simplest of all is the universe at large, it is far less complicated than the Earth, one of its most trivial members. The universe consists of billions of galaxies flying apart as if from an explosion that set it in motion, it is not lopsided, nor does it rotate. The more thoroughly scientists investigate the universe, the more clearly its simplicity shines through.

Which of the following statements can be supported by the text?

Given the record of our political class, the proposal to give tax rebates for political donations will likely meet a similar fate. Instead of cleaning up political life then, the bill runs the risk of being a godsend for fly-by-night middlemen and fixers, and unscrupulous businessmen. The other objection to the bill is a more traditional one, namely that rather than private donations, the solution is in state funding of parties. This not only ensures that there is some sense of proportion and fairness in the quantum of funding available to different parties, but also that funding does not become a means of determining the political agenda. Private funding, in this argument, is an unacceptable form of political lobbying which promotes the specific demands of donors apart from generally favoring conservative, mainstream parties, squeezing out those representing minority voices. Whatever its merits, the most serious obstacle to this kind of reasoning comes from the precarious nature of public finance in the country. At a time when the Indian state is already hard-pressed to find resources for education, health, and other social security activities, can there be a case for it to burden itself with a new category of expenses? In purely economic terms too, the proposed tax breaks do not augur well for the savings sector; and this when the sagging savings graph in the economy is already a matter of increasing anxiety.

Which demands according to the writer of the passage deserve better attention than the political funds?

The crisis begins in the womb with unplanned parenthood. Women with unplanned pregnancies are less likely to seek prenatal care. In the U.S. 80% of teenage pregnancies and 56% of all pregnancies are unplanned. The problems continue after birth where unplanned pregnancies and unstable partnerships often go hand in hand. Since 1950, the number of single-parent families has nearly tripled. More than 25 percent of all births today are to unmarried mothers. As the number of single parent families grows and more women enter the workforce, infants and toddlers are increasingly in the care of people other than their parents. Most disturbingly, recent statistics show that American parents are increasingly neglecting or abusing their children. In only four years from 1987-1991, the number of children in foster care increased by over 50 percent. Babies under the age of one are the fastest growing category of children entering foster care. The crisis affects children under the age of three most severely, the report says. Yet, it is this period from infancy through preschool years that sets the stage for a child’s future.

What can be the possible reasons for the increasing neglect and abuse of children?

Opera refers to a dramatic art form, originating in Europe, in which the emotional content is conveyed to the audience as much through music, both vocal and instrumental, as it is through the lyrics. By contrast, in musical theater an actor’s dramatic performance is primary, and the music plays a lesser role. The drama in opera is presented using the primary elements of theater such as scenery, costumes, and acting. However, the words of the opera, or libretto, are sung rather than spoken. The singers are accompanied by a musical ensemble ranging from a small instrumental ensemble to a full symphonic orchestra.

Which of the following statements about?Opera?can be supported from this text?

Adaptations enable living organisms to cope with environmental stresses and pressures. Adaptation can be structural or behavioral. Structural adaptations are special body parts of an organism that help it to survive in its natural habitat (e.g., skin color, shape, body covering). Behavioral adaptations are the ways a particular organism behaves to survive in its natural habitat. Physiological adaptations are systems present in an organism that allow it to perform certain biochemical reactions (e.g. making venom, secreting slime, being able to keep a constant body temperature). Adaptations are traits that have been selected for by natural selection. The underlying genetic basis for the adaptive trait did not arise as a consequence of the environment; the genetic variant pre-existed and was subsequently selected because it provided the bearer of that variant some advantage.

Which of the following are true statements about adaptations?

Australian Aborigines migrated from somewhere in Asia at least 30,000 years ago. Though they comprise 500-600 distinct groups, aboriginal people possess some unifying links. Among these are strong spiritual beliefs that tie them to the land; a tribal culture of storytelling and art; and, like other indigenous populations, a difficult colonial history. The Dreamtime: Aboriginal spirituality entails a close relationship between humans and the land. Aborigines call the beginning of the world the “Dreaming” or “Dreamtime”. In the “Dreamtime”, aboriginal “Ancestors” rose from below the earth to form various parts of nature including animal species, bodies of water, and the sky. Unlike other religions, however, aboriginal belief does not place the human species apart from or on a higher level than nature. Aborigines believe some of the Ancestors metamorphosed into nature (as in rock formations or rivers), where they remain spiritually alive.Storytelling, Art, and the Didgeridoo: The oral tradition of storytelling informs aboriginals’ vibrant cultural life. Songs illustrate the Dreamtime and other tales of the land, while dances and diagrams drawn in the sand accompany oral tales. In the Northern Territory, aboriginal art includes sculpture, bark and rock paintings, and baskets and beadwork. Rock carvings and paintings can be found in such places as Arnhem Land, Ubirr, and Nourlangie. Many aborigines earn a living through selling native artworks.Aboriginal music is often recognizable for its most famous instrument, the didgeridoo. A wind instrument typically made from bamboo, it extends about five feet and produces a low, vibrating hum. Aborigines use didgeridoos in formal ceremonies at such events as sunsets, circumcisions, and funerals.

Which of the following statements about Australian Aborigines can be supported from this text?