Ques:Read the following article and select the best answer. Article: Scientists have discovered a gene that plays a role in violence in men ill-treated in childhood.The discovery could explain why some experience unhappy childhoods and go on to normal lives, while others turn to violence, crime of antisocial deeds. But it will also restart another argument. Terrie Moffitt and Avshalom Caspi report in Science today that one common form of a gene in the brain makes men more likely to be violent--but only if they have experienced cruelty or rejection in childhood . The researchers followed up the life histories of 442 boys born in New Zealand in 1972. Of these, 154 had been ill-treated in the first 10 years, 33 of them badly. They had either experienced sexual attack, beatings or rejection by mother or stepparents. Of the 154 children , 55 had a less active variant of a gene called MAOA, and 99 had the more active variant . The 55 boys were more than twice as likely to have been in trouble as the other ill-treated group . They made up 12% of the total, but were responsible for 44% of all crimes from among the 442 boys. Prof Moffitt thought a "violence" gene had not been discovered. Boys with the less active form who were not ill-treated during childhood lived normal lives. "It is very common in the population. One third of us have it." she said, "So the gene doesn't do much of anything, it doesn't cause any trouble in any way, unless we are also ill -treated". The gene might also show the ability to bear mental stress. The army or the police might examine the applicants to see if they have the more active form . But the discovery also raises the argument that people with the less active form of the gene could be social dangers, to be treated with medicine. "This research can easily lead people to fix social problems through medical treatment," said David King of the UK Gene Alert Group. Question: We can learn from the passage that those men who have stronger ability to bear mental stress usually_. - have the more active variant of gene - have the less active variant of the gene - had ill-treated childhood - had no ill-treated childhood

Ans:have the more active variant of gene
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Ques:Read the following article and select the best answer. Article: Can people change their skin color1 without suffering like pop king Michael Jackson? Perhaps yes. Scientists have found the gene that determines skin color1. The gene comes in two versions, one of which is found in 99 percent of Europeans. The other is found in 93 to 100 percent of Africans, researchers at Pennsylvania State University report in the latest issue of science. Scientists have changed the color1 of a dark-striped zebrafish to uniform gold by inserting a version of the pigment gene into a young fish. As with humans, zebrafish skin color1 is determined by pigment cells, which contain melanin . The number, size and darkness of melanin per pigment cell determine skin color1. It appears that, like the golden zebrafish, light-skinned Europeans also have a mutation in the gene for melanin production. This results in less pigmented skin. However, Keith Cheng, leader of the research team, points out that the mutation is different in human and zebrafish genes. Humans acquired dark skin in Africa about 1.5 million years ago to protect bodies from ultra-violet rays of the sun , which can cause skin cancer. But when modern humans leave Africa to live in northern latitudes, they need more sunlight on their skin to produce vitamin D. So the related gene changes, according to Cheng. "Asians have the same version of the gene as Africans, so they probably acquired their light skin through the action of some other gene that affects skin color1," said Cheng. The new discovery could lead to medical treatments for skin cancer. It also could lead to research into ways to change skin color1 without damaging it like chemical treatment did on Michael Jackson. ks5u Question: The passage mainly tells us that _ . - people can not change their skin color1 without any pain - the new discovery could lead to research into ways to change skin color1 safely - pop king Michael Jackson often changed his skin color1 as he liked - scientists have found out that people's skin color1 is determined by the gene

Ans:scientists have found out that people's skin color1 is determined by the gene
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Ques:Read the following article and select the best answer. Article: Why does everything else seem so interesting when you have to study? Let's find out how to stay focused.Follow each piece of advice that is given below. Switch Off Your Cell phone Nothing's worse for a teenager to stay without their cell phone even for a minute.However,if you can't find yourself focused for a long time,you know that it's the continual sound in your cell phone that isn't letting you learn.Stop sending text massages to your friends saying'I can't study'or'how much have you finished'.Remember,you don't have enough time to kill,do you? Soothing Music Helps Bizarre as it may sound,while things such as TVs,PCs,or MP3 players are not acceptable while studying,researchers claim that listening to soothing music actually helps you stay focused.Try it.It might work for you. A New Timetable Every Day One of my personal techniques,tried and tested,is creating a new timetable every day. You don't really need to draw one.Instead,just stare at the clock,and divide your hours.Suppose.2 hours of continuous study require a 30-minute break after that.Relax and then go back to study for another two hours.Just be true to yourself, and try not to get distracted in those two hours. Try Different Places to Study The idea is,looking for a place that doesn't have much to focus upon is the best way of staying organized while studying.A lonely corner in your house is perfect in this case.Hey! Why don't you go to your school library,if things get worse? It has the perfect atmosphere,silence,and a librarian,every time! Now this will work for sure,trust me. Question: What's the text mainly about? - The advantages of staying focused. - How to stay focused while studying. - How to follow your teacher's instructions. - Advice on how to make progress in study.

Ans:
How to stay focused while studying.
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