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In this [rapidly / rapid] changing world, we are seeing more examples of science fiction becoming science [factual / fact] . A team of American and Chinese scientists has created the world's first part-human, part-monkey embryo. This [fission / fusion] of genetic tissue is called a chimera. The scientists say it [potent / potentially] paves the way for lifesaving medical [advances / forwards] . Bio-scientist Henry Greely explained the importance [of / at] this scientific breakthrough. He said: "The long-term goal [off / of] this research team is to grow human organs in pigs - kidneys, livers, hearts, etc." He added: "They want to do [what / that] to make more human organs for transplants. Tens of thousands of people [on / in] a transplant list die every year [waiting / wanting] for a transplant."

The groundbreaking research [incited / involved] injecting 25 human cells into the embryos of long-tailed macaque monkeys. The [human / humane] cells developed inside 132 of the embryos. The scientists [studiously / studied] the development of the embryos for 19 days. Many people are disturbed [of / by] the research and believe it belongs [at / to] the realm of horror movies. Professor Greely said he appreciated that there are many [ethic / ethical] concerns around the creation and [use / used] of chimera. He said: "Every time a person [gets / getting] an organ transplant, the result is an intra-species chimera - an organism made [down / up] of cells from two members of the same species....When a human gets a pig heart [value / valve], she becomes an inter-species chimera."

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