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I'm taking a test and have to guess the right answer to the question after the article. Article: Bears and humans often meet in National Parks. Although campers and hikers are warned not to feed the bears, many people ignore these warnings and feed the beasts anyway. When bears are used to people's food, problems soon arise. Bears like to eat a large variety of things, both meat and vegetable. Without human assistance, bears live nicely on roots, twigs, leaves of trees, insects and small animals. With people around, the bears' tastes quickly expand to include sandwiches, hot dogs, hamburgers, and anything else they can temp humans into giving up. Bears often develop clever strategies for getting people to let go their food supplies. More often than not, an unsuspecting hiker has taken off his or her pack for a rest only to have a bear charge out of the woods, grab the pack and quickly disappear into the underbrush with it. Hanging the pack on a tree branch won't help. Bears have been known to climb up, jump off, and catch the pack on the way down. One mother bear stretched up with her baby on her shoulders to reach a pack stored on a pole. Many bears threaten people into giving up their supplies. Although a bear is unlikely to attack a person and would probably run away if screamed at, few people are willing to do so. Most people drop the pack and run the other way. This, of course, delights the bear. In some places, the Park Service installed some metal barrels with lids to help campers keep their supplies safe from bears. Although the bears were unable to open these containers, the effort was less than successful. Most campers, unable to tell the metal drums from rubbish cans, never used them for the intended purpose. Question: Which of the following is TRUE? Options: A: If fed on sandwiches and hot dogs, the bears would no longer eat roots, twigs and insects . B: It's likely that bears would hurt people if the people didn't give up their food. C: Most people would frighten away the bears that would temp their food. D: Seeing a pack, the bear would quickly snatch it and run away with it.
(Answer)
D

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I'm taking a test and have to guess the right answer to the question after the article. Article: Plants may not have eyes and ears,but they can recognize their siblings ,and researchers at the University of Delaware have discovered how.The ID system lies in the roots and the chemical signals they secrete . Canadian researchers published that sea rocket,a common seashore plant,can recognize its siblings.Susan Dudley observed that when siblings are grown next to each other in the soil,they "play nice" and don't send out more roots to compete.However,the moment one of the plants is thrown in with strangers,it begins competing with them by rapidly growing more roots to take up the water and mineral nutrients in the soil. After reading Dudley's study,Bais decided to find the method behind the sibling recognition.Working in his laboratory,Bais and his doctoral student Meredith Biedrzycki set up a study with wild populations of Arabidopsis thaliana.In a series of experiments,young seedlings were exposed to liquid media containing the root secretions from siblings,from strangers,or only their own secretions.The length of the longest lateral root was measured.The exposure of plants to the root secretions of strangers induced greater lateral root formation than exposure of plants to sibling secretions.Strangers planted next to each other are often shorter,because so much of their energy is directed at root growth.Because siblings aren't competing against each other,their roots are often much shallower . Biedrzycki did the _ laboratory research,observing more than 3,000 plants involved in the study every day for seven continuous days and documenting the root patterns."Arabidopsis roots are nearly translucent when they are young and were also twisted when I removed them from plates,"Biedrzycki notes."This manuscript is very important for my research since the focus of my thesis project is understanding the biochemical ways behind root secretions." The research also may have implications for the home gardener."Often we'll put plants in the ground next to each other and when they don't do well,we blame the... Question: What encouraged Bais to study the sibling recognition? Options: A: Sea rocket. B: Plants' sensing system. C: Biedrzycki's thesis project. D: Dudley's study.
(Answer)
D

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I'm taking a test and have to guess the right answer to the question after the article. Article: Teenagers need family love and support at a time when lots of other things in their lives are changing . You can keep family relationships with your child strong through ordinary , everyday activities . Adolescence can be a difficult time ---your child is going through rapid physical changes as well as emotional ups and downs . Young people aren't sure where they fit , and they are still trying to work it out . Adolescence can also be a time when peer influences and relationships can cause stress for teenagers and their families , and family support can be vital (=very important) to getting through these challenges. During this time , your family can be a secure emotional base where your child feels loved and accepted , no matter what's going on in the rest of her life . Your family can build and support your child's self-belief , confidence and optimism .When your family set rules , boundaries and standard behaviour, you give your child a sense of consistency and predictability . And believe it or not , your life experiences and knowledge can be really useful to your child ---she just might not always want to know that . Supportive and close family relationships can reduce risky teenage behaviour, such as alcohol and drug abuse , and problems such as depression . They can also increase your child's feeling of being connected to school , and his desire to do well academically . Strong family relationships can go a long way toward helping your teenager grow into a well-adjusted , considerate and caring adult . Research suggests that just being around family is associated with fewer behaviour problems in teenagers. This could be as simple as being in the kitchen when your child's in her room , so she knows she could come and talk to you if she wanted to . Teenagers benefit from knowing that support is available , even though they might not be using it . Question: According to the text , we can conclude _ . Options: A: school plays less role in educating children B: family can be vital for children to spend adolescence C: teenagers sometimes can obey what parents say D: parents should often help children to study at home
(Answer)
B