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With only about 1,000 pandas left in the world, China is desperately trying

游客2023-07-24  50
问题     With only about 1,000 pandas left in the world, China is desperately trying to clone the animal and save the endangered species. That’s a move similar to what a Texas A&M University researcher has been undertaking for the past five years in a project called "Noah’s Ark".
    Noah’s Ark is aimed at collecting eggs, embryos, semina(精子) and DNA of endangered animals and storing them in liquid nitrogen(液态氮). If certain species should become extinct, Kraemer says there would be enough of the basic building blocks to reintroduce the species in the future.
    It is estimated that as many as 2,000 species of mammals, birds and reptiles (爬行动物) will become extinct over the next 100 years. The panda, native only to China, is in danger of becoming extinct in the next 25 years.
    This week, Chinese scientists said they grew an embryo by introducing cells from a dead female panda into the egg cells of a Japanese white rabbit. They are now trying to implant the embryo into a host animal. The entire procedure could take from three to five years to accomplish.
    "The nuclear transfer of one species to another is not easy, and the lack of available panda eggs could be a major problem," Kraemer believes. "They will probably have to do several hundred transfers  to result in one pregnancy. It takes a long time and it’s difficult, but this could be groundbreaking  science if it works. They are certainly not putting any live pandas at risk, so it is worth the effort,"  adds Kraemer, who is one of the leaders of the Missyplicity Project at Texas A&M, the firstever  attempt at cloning a dog.
    "They are trying to do something that’s never been done, and tiffs is very similar to our work in Noah’s Ark. We’re both trying to save animals that face extinction. I certainly applaud their effort and there’s a lot we can learn from what they are attempting to do. It’s a research that is very much needed. " [br] The goal of "Noah’s Ark" Project is to _______.
选项 A、make efforts to clone the endangered panda
B、save endangered animals from extinction
C、implant embryo into a host animal
D、collect DNA of endangered animals to study
答案 B
解析 推理判断题。文章第二段说“诺亚方舟”计划的目的在于收集濒临灭绝动物的卵子、胚胎、精子以及DNA，并用液体氮把它们储存起来。如果某些物种灭绝了，将来会有足够的基础建设材料再造这些物种。文章最后一段第二句"We’re both trying to save animals that face extinction．”也进一步阐明了它的目的是拯救濒临灭绝的物种。
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