Câu hỏi:
21/04/2020 1,012Read 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 38 to 45.
Oxford University scientists have launched an attempt to bring the Northern White Rhinoceros back from beyond the “point of no return” using IVF (In Vitro Fertilization). The team believes a pioneering treatment can prompt a revival of the persecuted species, despite the death last year of the last known male and the fact that the two remaining females, Najin and Fatu, cannot have calves.
One of two subspecies of White Rhinoceros, the Northern Rhinoceros once ranged over tracts of Uganda, Sudan, Central African Republic and the Democratic Republic of Congo. However, the value of its horns saw it poached from a population of approximately 500 to 15 in the 1970s and 1980s. A small recovery – numbers reached 32 – from the early 1990s was then reversed from 2003 when illegal hunting intensified again.
The Oxford researchers believe that it will be possible to remove ovarian tissue from the animals and stimulate it to produce eggs, which would then be fertilized from sperm preserved from male Northern White Rhinoceros. The embryos would then be implanted into a surrogate mother of a similar species, probably a Southern White Rhinoceros. The technique has been used successfully in mice for nearly two decades; it has also been accomplished for some species of dog, horse and cat. However, it has never been attempted before on a rhinoceros, meaning the Oxford team plan to perfect it first by conducting a series of trials on ovarian tissue taken from a Southern White Rhinoceros.
In principal, the benefit of removing ovarian tissue for use in the lab is that it can go on producing eggs. Other researchers are exploring the possibility of using the remaining Northern White Rhinoceros sperm to cross–breed with Southern White Rhinoceros, however Dr Williams believes the focus should be on preserving the identity of the northern species. “This will be a huge buffer against disease and ill health in the long–term, and give the new herds better genetic ability to adapt to changing environments in the future.”
Najin was born in captivity in 1989 and Fatu in 2000. They both belong to the Cvur Kralove Zoo in the Czech Republic, which shipped them to the Ol Pejeta Conservancy in Kenya in 2009 amid tight security. In place of their horns, keepers have fitted radio transmitters to allow close monitoring of their whereabouts in the large paddock areas. The team has enough funding for three years’ research, donated from Foundation Hoffman, however Oxford University has launched a public appeal to raise the money to secure the project long term.
It can be inferred from paragraph 4 that ______.
Đáp án chính xác
Câu hỏi trong đề:
Đề luyện thi THPT Quốc Gia - Năm 2020 Môn thi: TIẾNG ANH !!
Sách mới 2k7: Tổng ôn Toán, Lí, Hóa, Văn, Sử, Địa…. kỳ thi tốt nghiệp THPT Quốc gia 2025, đánh giá năng lực (chỉ từ 110k).
Quảng cáo
Trả lời:
Giải bởi Vietjack
Kiến thức: Đọc hiểu
Giải thích:
Có thể suy ra từ đoạn 4 rằng ______.
A. Giữ gìn bản sắc của các loài phía bắc là ưu tiên trong thời kỳ này.
B. Tê giác lai có thể thích nghi với môi trường tương lai tốt hơn so với tổ tiên của chúng.
C. Tiến sĩ William muốn thúc đẩy lai giữa tê giác Nam và Bắc.
D. Nhân giống chéo luôn khiến động vật mất khả năng tự nhiên để thích nghi với môi trường.
Thông tin: Other researchers are exploring the possibility of using the remaining Northern White Rhinoceros sperm to cross–breed with Southern White Rhinoceros, however Dr Williams believes the focus should be on preserving the identity of the northern species.
Tạm dịch: Các nhà nghiên cứu khác đang khám phá khả năng sử dụng tinh trùng tê giác trắng phương Bắc còn lại để lai tạo với tê giác trắng phương Nam, tuy nhiên, tiến sĩ Williams tin rằng cần tập trung vào việc giữ gìn bản sắc của các loài phía bắc.
Chọn A
Nhà sách VIETJACK:
CÂU HỎI HOT CÙNG CHỦ ĐỀ
Câu 1:
Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.
It’s possible that Joanna didn’t receive my message.
Xem đáp án »
21/04/2020
92,815
Câu 2:
Mark the letter A, B, C or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.
He is very intelligent. He can solve all the problems in no time.
Xem đáp án »
21/04/2020
61,618
Câu 3:
If you _____ to my advice in the first place, you wouldn’t be in this mess right now.
Xem đáp án »
21/04/2020
58,530
Câu 4:
The world’s biodiversity is declining at an unprecedented rate, which makes wildlife _____.
Xem đáp án »
21/04/2020
56,165
Câu 5:
The school drama club is _______ a play for the school’s anniversary, which is due to take place next month.
Xem đáp án »
21/04/2020
21,022
Câu 6:
______ busy she is; she manages to pick her children up after school every day.
Xem đáp án »
21/04/2020
17,585
về câu hỏi!