Câu hỏi:
22/01/2025 6Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 30 to 34.
Genetic modification of foods is not a new practice. It has been practiced for thousands of years under the name of "selective breeding". Animals and plants were chosen because they had traits that humans found useful. Some animals were larger and stronger than others, or they yielded more food, or they had some other trait that humans valued. Therefore, they were bred because of those traits. Individuals with those traits were brought together and allowed to breed in the hope that their offspring would have the same traits in greater measure.
Much the same thing was done with plants. To produce bigger or sweeter fruit, or grow more grain per unit of land, strains of plants were combined and recombined to produce hybrids, or crossbreeds that had the desired traits in the right combinations. All the while, however, biologists wondered: is there a more direct and versatile way to change the traits of plants and animals? Could we rewrite, so to speak, the heredity of organisms to make them serve our needs better?
In the 20th century, genetic modification made such changes possible at last. Now, it was possible to alter the genetic code without using the slow and uncertain process of selective breeding. It even became possible to blend plants and animals genetically: to insert animal genes into plants, for example, in order to give the plants a certain trait they ordinarily would lack, such as resistance to freezing. The result was a tremendous potential to change the very nature of biology.
Which of the following IS NOT achieved by genetic modification?
A. Giving plants necessary traits taken from animals’ genes
B. Producing hybrids or crossbreeds from many animals and plants
C. Encouraging people to give up selective breeding completely
D. Making big changes to the very nature of biology
Trả lời:
Đáp án C
Theo thông tin bài văn cung cấp, ta thấy:
- "Now, it was possible to alter the genetic code without using the slow and uncertain process of selective breeding."
- "It even became possible to blend plants and animals genetically: to insert animal genes into plants, for example, in order to give the plants a certain trait they ordinarily would lack, such as resistance to freezing."
- "Strains of plants were combined and recombined to produce hybrids, or crossbreeds that had the desired traits in the right combinations."
- "The result was a tremendous potential to change the very nature of biology."
Dịch nghĩa:
“Biến đổi gen thực phẩm không phải là một thực hành mới. Nó đã được thực hiện trong hàng ngàn năm với tên gọi "chọn lọc giống". Động vật và thực vật được chọn vì chúng có các đặc điểm mà con người thấy hữu ích. Một số động vật lớn hơn và mạnh mẽ hơn những loài khác, hoặc chúng cung cấp nhiều thực phẩm hơn, hoặc chúng có một đặc điểm nào đó mà con người đánh giá cao. Vì vậy, chúng được lai giống vì những đặc điểm đó. Những cá thể có những đặc điểm này được tập hợp lại và cho phép lai giống với hy vọng rằng con cháu của chúng sẽ có những đặc điểm đó ở mức độ lớn hơn.
Cũng giống như vậy với thực vật. Để tạo ra quả lớn hơn hoặc ngọt hơn, hoặc để trồng được nhiều hạt hơn trên mỗi đơn vị diện tích, các dòng thực vật được kết hợp và tái kết hợp để tạo ra các giống lai hoặc giống ghép có các đặc điểm mong muốn ở đúng tổ hợp. Tuy nhiên, các nhà sinh học luôn tự hỏi: liệu có một cách trực tiếp và linh hoạt hơn để thay đổi đặc điểm của thực vật và động vật không? Liệu chúng ta có thể "viết lại" di truyền của các sinh vật để khiến chúng phục vụ nhu cầu của chúng ta tốt hơn không?
Vào thế kỷ 20, công nghệ biến đổi gen cuối cùng đã biến những thay đổi đó thành hiện thực. Bây giờ, có thể thay đổi mã di truyền mà không cần sử dụng quá trình chọn lọc giống chậm chạp và không chắc chắn. Thậm chí, nó còn trở nên khả thi để lai ghép gen giữa thực vật và động vật: chẳng hạn như chèn gen động vật vào thực vật để cung cấp cho chúng một đặc điểm mà chúng thông thường không có, như khả năng chống đóng băng. Kết quả là tiềm năng to lớn để thay đổi bản chất của sinh học.”
CÂU HỎI HOT CÙNG CHỦ ĐỀ
Câu 2:
Which notice (A-H) says this (1-5)? Do the matching.
1. This is not for adults.
2. You can’t drive this way.
3. We can help you day and night.
4. You can have dinner here.
5. Come here to book a holiday.
Your answer:
4________
2. You can’t drive this way.
3. We can help you day and night.
4. You can have dinner here.
5. Come here to book a holiday.
Your answer:
4________
Câu 5:
Choose the best answer.
The man _______ the door and _________ pieces of paper.
Câu 6:
Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase for each of the blanks.
School exams are, generally speaking, the first kind of test we take. They find out how much knowledge we have gained. But do they really show how intelligent we are? After all, isn’t it a__________(23)__________that some people who are very academically successful don’t have any common sense. Intelligence is the speed__________(24)__________which we can understand and react to new situations and it is usually tested by logic puzzles. Although scientist are now preparing__________(25)__________computer technology that will be able to “read” our brains,__________(26)__________tests are still the most popular ways of measuring intelligence.
A person’s IQ is their intelligence__________(27)__________it is measured by a special test. The most common IT tests are run by Mensa, an organization that was found in England in 1946. By 1976, it had 1,300 members in Britain. Today there are 44,000 in Britain and 100,000 worldwide , largely inthe US.
Điền vào số (24)
Câu 7:
Decide T (true)/ F (false) for each statement.
Last year I visited the Somerset Levels, a coastal plain and wetland area in Somerset, South West England. This area is home to one of Somerset’s oldest traditional crafts - willow basket making. Basket making began in the area a long time ago. At the beginning of the 19th century, more than three thousand acres of willow trees were planted commercially there because the area provided an excellent natural habitat for their cultivation. I’d seen willow baskets before I visited the Levels, but I was still amazed at the numerous products created by the basket makers there. They make lobster pots, bread trays, and even passenger baskets for hot air balloons. Although the arrival of plastics in the 1950s caused the basket making industry to decline, willow growing and basket making have continued to play a significant role in Somerset’s rural economy. Willow growers and basket makers have dealt with this challenge by finding new markets and innovative ways of using willow. They make willow charcoal for artists and bower seats for gardens. Some even weave willow coffins. Therefore, people here can still live on the craft that their great-grandparents passed down to them.
Willows can grow well in the area because of its favourable natural conditions.
Câu 8:
If one type of manufacturing expands, it is like that another type will shrink considerably.
Câu 9:
Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 36 to 42
Today, Snyder is seeing the fruits of the collaboration. In a recent issue of the Journal of Comparative Psychology (Vol. 117, No. 3), the research group published the first study of giant panda cub-rearing and separation. The study is the first step in examining the impact of a common breeding practice in China: separating captive cubs before they are six months old so that the mothers will be able to reproduce again sooner. Cubs in the wild stay with their mothers for 1.5 to 2.5 years.
Snyder and her co-authors, including Maple and psychologist Mollie Bloomsmith, PhD, theorize that separating cubs from their mothers too early may harm their social development, and could underlie why so many captive pandas fail to breed. Captive males often show little sexual interest in females or are too aggressive.
The research team has also conducted urinary and behavioral analyses of female giant pandas during the breeding season, which is generally in the spring, and is examining the behavior of giant panda mothers. Graduate student Megan Wilson, who also has worked in Chengdu, is investigating sequences of play-fighting for her dissertation. And former graduate student and Chengdu researcher Loraine Tarou, PhD, examined giant panda cognition.
Tarou, now an assistant professor at Grand Valley State University in Michigan, is the first to examine how captive pandas forage for food and learn to adapt to changes in their environment. She compared her findings with the cognition of the spectacled bear and found that while both use spatial memory to find food, the spectacled bears used visual cues the pandas did not pick up on.
The finding indicates that giant pandas' reliance on spatial memory alone may cause them to have difficulty when their food sources are abruptly changed or moved--a big problem for an animal that consumes nearly 30 pounds of bamboo a day.
While such basic research may not have immediate application, says Tarou, it is contributing to scientists' growing knowledge of the species.
(Adapted from https://www.apa.org/)
The word “conducted” in paragraph 3 is closest in meaning to ______.
Câu 10:
Read the passage below and choose one correct answer for each question.
Global warming and cooling have occurred naturally throughout history. But in the last 200 years, humans’ uses of fossil fuels and clear cutting of forests have increased the amount of carbon dioxide and other gases in the atmosphere. These gases trap some of the radiation from the sun which then increases the Earth’s temperature. Given the current state of environmental pollution caused by human activities, scientists believe the average temperature of the earth may increase 1-2 degrees Celsius which put simply, means some places will get much hotter and some much colder. At the same time, this overall warming effect means more frequent and more intense weather systems, especially in terms of flooding and drought.
Viet Nam is one of the most vulnerable environments due to its location on the planet. It is already subject to some of the earth’s most powerful weather systems and the increased frequency and intensity of storms will affect it often and directly, especially in coastal areas where most people live. Various estimates have been made as to the possible impacts. The most directly affected sector will be agriculture, which is very sensitive to flooding and the effects of extreme weather.
Viet Nam has the advantage of coming relatively late into the industrialization, urbanization, and modernization process. This means it can avoid many of the mistakes made by wealthier industrial countries. For example, wireless communication networks can be built from the start rather than installing lines that can easily be destroyed in extreme weather. Cities can be designed and located in less vulnerable locations. Climate-friendly building codes and standards can be created that are both more efficient and less prone to heat stress, wind damage, and flooding. Climate friendly transport systems, especially public transport, can be adopted.
The vast, humid expanse of the delta is home to more than 17 million people, who (4)_______ for generations on its thousands of river arteries.
Câu 12:
She worked hard. She passed her exam.
→ She worked ..........................................
Câu 15:
Choose the underlined word or phrase (A, B, C or D) that needs correcting.
If one is invited out to a dinner, it is perfect proper to go either with or without a gift.
A B C D