Among Nature’s most intriguing phenomena are the partnerships formed by any different species. The name used for these relationships, Symbiosis, comes from Greek meaning "living together". Not all symbiotic relationships are the same. There are some called commensal relationships, in which one partner gains a benefit while the other gains little or none but is not harmed. One example is the relationship between two types of fish remoras and sharks. The remora, which is long and often striped, attaches itself to a shark (sometimes to another type of fish or a whale), using a sucker on its head. When the shark makes a kill, the hitchhiker briefly detaches itself to feed on the scraps. Another type of symbiotic relationship is parasitism, in which one partner benefits at the expense of others. Ticks and tapeworms are among familiar parasites. 

The third type of symbiotic relationship, called mutualism, is a true partnership in which both partners benefit. The relationship may be limited as when zebras and wild best graze together on the vast African grasslands. Each species can survive on its own, but together their chances of detecting predators are improved because each contributes a specially keen sense. (Zebras have the better eyesight;  wild beast, hearing and sense of smell). In a few cases partners are so interdependent that one cannot survive without the other. Most mutualistic relationships probably lie some where in between

Commensal relationship is a type of symbiosis in which the relationship is beneficial 

Directions: In each of the questions given below, four words are given in bold. These four words may or may not be in their correct positions. The sentence is then followed by options with the correct combination of words that should replace each other in order to make the sentence grammatically and contextually correct. Find the correct combination of words that replace each other. If the sentence is correct as it is, select '5' as your option.

Elinor wanted (A) to move to America in order to pursue (B) further studies, but her married (C) were adamant about getting her parents (D) early.

Directions : You have a passage with 10 questions. Read the passage carefully and choose the best answer to each question out of the four alternatives.

Long ago men spent most of their time looking for food. They ate anything they could find. Some lived mostly on plants. They ate the fruit, stems, and leaves of some plants and the roots of others. When food was scarce, they ate the bark of trees. If they were lucky, they would find a bird’s nest with eggs. People who lived near the water ate fish or anything that washed ashore, even rotten whales. Some people also ate insects and small animals like lizards that were easy to kill.

Later, men learned to make weapons. With weapons, they could kill larger animals for meat. These early people had big appetites. If they killed an animal, they would drink the blood, eat the meat, and chew the bones. When they finished the meal, there was nothing left.

At first men wandered from place to place to find their food. But when they began to grow plants, they stayed in one place and ate what they could grow. They tamed animals, trained them to work, and killed them for meat. Life was a little better then, but there was still not much variety in their meals. Day after day people ate the same food.

Gradually men began to travel greater distances. The explorers who sailed unknown seas found new lands. And in these lands they found new food and spices and took them back home.

The Portuguese who sailed around the stormy Cape of Good Hope to reach China took back “Chinese apples”, the fruit we call oranges today. Later, Portuguese colonists carried orange seeds to Brazil. From Brazil oranges were brought to California, the first place to grow oranges in the United States. Peaches and melons also came from China. So did a new drink, tea.

What did men eat if there was shortage of food? 

Direction: Read the following passage carefully and answer the questions given below it. Certain words are given in bold to help you locate them while answering some of the questions.

The effects of the worst economic downturn since the Great Depression are forcing changes on state governments and the U.S. economy that could linger for decades. By one Federal Reserve estimate, the country lost almost an entire year's worth of economic activity – nearly $14 trillion – during the recession from 2007 to 2009. The deep and persistent losses of the recession forced states to make broad cuts in spending and public workforces. For businesses, the recession led to changes in expansion plans and worker compensation. And for individual Americans, it has meant a future postponed, as fewer buy houses and start families. Five years after the financial crash, the country is still struggling to recover." In the aftermath of [previous] recessions there were strong recoveries. That is not true this time around," said Gary Burtless, a senior fellow at the Brookings Institution. "This is more like the pace getting out of the Great Depression." For years, housing served as the backbone of economic growth and as an investment opportunity that propelled generations of Americans into the middle class.

But the financial crisis burst the housing bubble and devastated the real estate market, leaving millions facing foreclosure, millions more underwater, and generally stripping Americans of years' worth of accumulated wealth. Anthony B. Sanders, a professor of real estate finance at George Mason University, said even the nascent housing recovery can't escape the effects of the recession. Home values may have rebounded, he said, but the factors driving that recovery are very different than those that drove the growth in the market in the 1990s and 2000s. Sanders said more than half of recent home purchases have been made in cash, which signals investors and hedge funds are taking advantage of cheap properties. That could freeze out average buyers and also mean little real economic growth underpins those sales. Those effects are clear in homeownership rates, which continue to decline. In the second quarter of this year, the U.S. homeownership rate was 65.1%, according to Census Bureau data, the lowest since 1995. In the mid-2000s, it topped 69%, capping a steady pace of growth that began after the early 1990s recession. Reversing that will be a challenge, in part because credit has tightened and lending rules have been toughened in an effort to avoid the mistakes that inflated the housing bubble in the first place.

"Credit expanded, and now contracted, and it's going to be tight like this as far as the eye can see," Sanders said. "We so destroyed so many households when the bubble burst, there's just not the groundswell to fill the demand again." Some are skeptical that the tight credit market and new efforts to regulate the financial markets, like the Dodd-Frank law, will prove lasting. Americans have often responded with calls for regulation after financial sector-driven crises and accusations of mismanagement, according to Brookings' Burtless. "But eventually, those fires cool down," he said. "It's not as though this memory of what can go wrong sticks with us very long." That can be seen in the intense efforts to water down Dodd-Frank's regulations, Burtless said. Federal regulators have already made moves to relax requirements for some potential homeowners who were victims of the recent housing crisis. Even those steps and an unlikely return to easy credit might not fuel a full housing recovery without economic growth to back it up. As Sanders, referring to the growth in low-wage and part-time employment, put it: "At those wages, it's tough to scramble together down payments and mortgages’’.

 "Turmoil in the housing market has already reshaped the makeup of households nationwide. Homeownership rates among people with children under 18 fell sharply during the recession, declining 15% between 2005 and 2011, according to Census Bureau data. In some states it was far worse. For Michigan, the decline in homeownership was 23%, and in Arizona and California it was 22%. Lackluster job growth has outlived the downturn. A study by the Economic Policy Institute showed wages for all workers, when adjusted for inflation, grew just 1.5% between 2000 and 2007. But the last five years wiped out even those modest gains—the study found wages declined for the bottom 70% of all workers since the recession began. However, some areas have seen manufacturing jobs climb back from recessionary lows, and the energy sector has been a boon for some Midwestern states. One hopeful sign for workers is the shift away from manufacturing growth in the typically low-wage South back toward the Rust Belt states, reversing a movement that was taking hold before the downturn. That trend is documented in a 2012 report from the Brookings Institution, "Locating American Manufacturing: Trends in the Geography of Production.’’

"From 2000 to 2010, both the Midwest and South lost manufacturing jobs at about the national rate of 34%. But the Midwest has seen nearly half of all manufacturing jobs gained since 2010, almost double the increase in the South. For Michigan, the growth was 19%; in Indiana, 12%. Even with that growth, there are caveats. Autoworker unions have ceded ground with companies on wages and benefits, for example, allowing new hires to work for lower pay and fewer benefits than those who've held their jobs longer. Unemployment remains stubbornly high in some states, and the jobs created have leaned heavily toward part-time and low-pay work. A study from the San Francisco Federal Reserve found the proportion of U.S. jobs that are part-time is high, as many of the jobs lost during the recession have not returned.

Choose the word/group of words which is most similar in meaning to the word/group of words printed in bold as used in the passage.
Q. Downturn

Directions: Read the passage carefully and answer the questions that follow:

Over the years, there have been many cases of news breaking about plastic toys and their containment of toxins. In addition to the harmful ingredients that can be found in plastic, we also have to take into account the effect on the environment that plastic usage has.

The internet is flooding with ways to reduce plastic usage and people are more aware of the need to cut down on this. Still, it’s difficult to change behaviors and somehow parents easily end up with a great number of plastic toys at home. This happens partly because you receive gifts from friends and family, and to some extent because kids prefer bright-colored plastic toys more than bland, wooden ones.

Not all toys contain toxins, but they can be found in some cases. Toys that have toxins in them are hazardous to children mainly because of their tendency to swallow and chew on the toys, which can result in the toxins being absorbed by the body. When it comes to young children, even the smallest amounts of toxins can affect their health.

The toxins can either be found in the plastic itself or they can be included in the pigments used to color toys and make them more attractive to children.

Although there are EU regulations for which toxins may or may not be included in toys, there are products that can slip through the cracks. Plastic toys may, for example, be made of, or contain, polyvinyl chloride (PVC), which contains lead and cadmium — both toxins that are harmful to children.

The CE mark is supposed to be a sign of quality. The toys have gone through and followed the rigorous EU standards for toys. The EU notes, though, that this marking should only be seen as an indication, as it has been misused due to counterfeiting.

As goes for all plastic, plastic toys are made using fossil fuels, and therefore the production of them contributes to the environmental crisis at hand. Therefore, it would be a good idea to minimize the buying of new plastic toys.

Environmentalists have raised awareness around the fact that plastic toys are a big part of the plastic that ends up in landfills and oceans, which adds to the ongoing issue of plastic pollution. According to a survey done by the British Heart Foundation, 1 in 3 parents admits to having thrown away toys in working conditions. Considering that 90 percent of toys are in some way made of plastic, that quickly adds up to a lot of plastic waste.

In conclusion, yes plastic toys are damaging to the environment. Even though they have a longer life cycle than single-use plastic, they will at some point end up in a landfill — or worse in the sea as non-recyclable waste. But how can we stop this issue?

Buy sustainable and non-plastic toys if you do want to buy new toys, try to aim for toys made from more sustainable materials. There are plenty of retailers that focus on environmentally-friendly toys. For example, smaller e-commerce sites like Frida & Fritiof focus on providing non-toxic and eco-labeled toys. If you do want to buy plastic toys, try to minimize the environmental impact by buying them second-hand. There are plenty of charity shops where you can buy toys, but if that is not for you, you can use a site like eBay or any other online marketplace to find second-hand toys. Be aware, though, when buying second-hand toys that security standards might have been updated since they were produced, so double-check that they are up to today’s standards.

What can you infer from the line "Although there are EU regulations for which toxins may or may not be included in toys, there are products that can slip through the cracks."?

Directions: Read the following passage carefully and choose the best answer to each question out of the four alternatives.

The most logical and intelligent people seem to go berserk when talking about snakes. Recently a reputed scientist said with a wise look in his eyes that sand boas have two heads. The other day someone walked into my office and stated that in his village at least cobras mate with rat snakes. About other places he was not sure, he added modestly, but that was how it was in his village.

These stories about snakes are myths. Sand boas have only one head; vine snakes do not peck your eyes out; no snake will drink milk. But it is interesting to try and trace the origin of these untruths. The one about the sand boas two heads obviously exists because the short, stumpy tail of this snake looks remarkably like the head, an effective device to fool predators. Or take the one about vine snakes pecking at eyes. It was ‘probably started by a vine snake that had a bad aim, as snakes, when provoked, will bite the most prominent projection of the offender, which is usually the nose.

But the most interesting one is about snakes coming to the scene of killing to take revenge. It so happens that when injured or under stress, a snake exudes, a large quantity of musk. Musk is a powerful sex attractant, the snakes’ equivalent of after-shave lotion. So after a snake is killed, the ground around still has this smell and naturally a snake of the same species passing by will lick its lips and come to investigate. The killer of the snake, who is probably worried if the pooja he performed was adequate to liquidate the killing of a snake, sees the second snake and is convinced that it was not.

The Irula tribals have a good answer to the query about whether cobras have jewels in their heads; “If they did, we wouldn’t be snake catchers, we would be rajas!”

Irula tribals are

Read the passage given below and answer the questions that follow.

It is well accorded that COVID-19 extracts a huge toll on the mental health of patients and leaves behind a slew of neurological sequelae in its wake. However, what is alarming is the wide gamut of mental and neurological disorders seen even in those with milder symptoms. Such patients frequently reported being anxious, depressed and having difficulty in sleeping. A higher incidence of frank psychosis manifesting as disorganization of thought processes and personality disorders was also reported. Many survivors of COVID19 had to battle substance abuse in its immediate aftermath. There was a steep increase in the amount of alcohol consumed by regular drinkers. Persons who had stopped smoking and consuming alcohol resumed their habit in disconcerting numbers.

The occurrence of neurodegenerative disorders like Parkinsonism is concerning as this would bring longterm disability in the form of impaired mobility and memory decline. It has been hypothesized that the causative mechanism for many of the neurological conditions due to COVID-19 may be the direct invasion of the nervous system by the virus, an increased tendency to blood clotting or an exaggerated immune response by the body. Various other factors like pre-existing psychiatric illness, prolonged quarantine, perceived lack of organizational support, and social stigma are risk factors. Anxiety, Nervousness, and Posttraumatic stress disorder are often fuelled by fear of infecting other family members, physical distancing, loneliness, and ________ at home in cramped quarters.

The pandemic has radically transformed the way businesses function and services delivered. Remote working disrupts a healthy-work life balance. Face to face contact and human interactions which were considered so essential for emotional well-being has taken a backseat. Lack of comforting physical contact like shaking hands and hugging friends is stressful and disconcerting. Online classes and home-schooling have placed a gargantuan burden both on students and parents. Lack of access to reliable computer hardware and spotty internet connections, particularly in rural areas and in the economically backward have created a new class divide. Children have been deprived of co-curricular activities, participation in group events and sports which is essential for their holistic development. Mental stress and fatigue have increased manyfold due to the rigours imposed by virtual learning.

What is the synonym of the word gargantuan mentioned in the passage?

You have brief passages with 10 questions following each passage. Read the passages carefully and choose the best answer to each question out of the four alternatives

There is a general consensus that ‘International Understanding’ need to be taught as a separate subject at the school stage as that would add to the curricular load which is already too heavy. Instead it should be woven into the curriculum and the numerous opportunities that present themselves while teaching normal school subjects may be intelligently and imaginatively used by the teacher to promote International Understanding.

The school subjects which can be most profitably used for this purpose are History, Geography, Civics, Economics, Sociology, Political Science, Social Sciences, Languages as well as Physical and Life Sciences. However, at the higher education level, international education can be prescribed as a separate subject of study. In fact, the present situation in India broadly conforms to this consensus so far as the school stage is concerned.

At the under-graduate and the post-graduate levels, courses of study in subjects like History, Geography, Economics, Political Science, International Relations, International Law and International Organization have been prescribed by most of the universities and these contain content which has a direct or indirect bearing on promoting UNESCO ideals

On reading Para 1, it can be inferred that