The present invention pertains to methods for cloning animals. In particular, the invention includes methods of cloning an animal by combining a genome from an activated donor cell with an activated enucleated oocyte to thereby obtain a nuclear transfer embryo, and impregnating an animal with the ...
A. Cloning animals. B. Cloning people. C. Cloning nothing. 相关知识点: 试题来源: 解析 【答案】 B 【解析】 【原文】 W: I don't think it is good to clone people. M: Why?Is it very different from cloning animals? W: Of course,because it will cause many problems. Q: What ...
阅读理解 A The history of cloning animals is as fol?lows. Cloning of nonmammals was first ac?complished in 1952. However cloning of mam?mals proved much more difficult with the first successful clone being the sheep Dolly in 1996. Dolly died a
What is cloning Cloning is the creation of ceils or whole animals using DNA from a single "parent", by passing the normal reproductive process. The clone has the same DNA as the parent. The most common process takes DNA from one cell and puts it in a hollowed-out egg. Chemicals and ...
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B 试题分析：考查副词：句意：克隆植物是直接的然而克隆动物要复杂的多。A. very非常，B. far很，非常，C. fairly相当，D. quite很，相当，只有far后面可以接形容词副词比较级，选B。
By the year 2050, cloning(克隆)will be used in many ways. It will bring back animals that disappeared many years ago. The whole world will be a big family. We’lllive a much easier and better life. 1. What are the four students talking about?
任何一本）吗？并不确定是否有，也不确定有很多，所以在紧跟的进一步说明问话原因时，最好用one代指（与前面的any在意义上保持一致，any books使用复数，主要是语法原因，而非意义。使用them，那就是已经确定有，而且不止一本，那前面一句话就属于明知故问了，不符合逻辑。所以选B不选A。
was to investigate which method of tumor development/growth—established patient-derived cell lines (orthotopic and heterotopic), primary patient-derived tumor cells/material (orthotopic and heterotopic), or genetically modified animals—provides the best tumor take rate and at what duration of incubation...