晚练册 第9周-【晨读晚记】2023-2024学年高三上学期英语阅读强化训练

Week Nine 第9周 晚练 的阅读理解A Fish genetically engineered to glow blue,green,or red under blacklight have been a big hit among aquarium lovers for years.But the fluorescent (pet is not restricted to glass displays anymore.The red-and-green-glowing versions,more vivid than normal zebrafish even in natural light,have escaped fish farms in southeastern Brazil and are multiplying (in creeks in the Atlantic Forest,a new study shows.It is a rare example of a transgenic animal accidentally becoming established in nature,and a concern for biologists,who worry the transgenic fish could threaten the local fauna in one of the most bio-diverse spots on the planet. In the 2000s,companies saw the potential of the fish as pets.Trademarked as Glofish,they became the world's first genetically engineered species to be commercially available.Now,they are one of the first to escape and thrive in nature.Early on,environmentalists worried about the possibility,and Glofish sales were banned in some U.S.states such as California and several countries-including Brazil.In 2014,a single Glofish was spotted in canals of Florida.But it had not multiplied,probably because native predators such as the eastern mosquitofish and the largemouth bass ate the intruder,said the biologist who spotted the fish,Quenton Tuckett. Unlike Florida,Glofish thrived in the Brazilian creeks.In 2017 he and colleagues began to survey five creeks in three cities,finding transgenic zebrafish in all of them. The Glofish are reproducing all year round,with a peak during the rainy season-just as native zebrafish do in Asia.But the transgenic fish seem to achieve sexual maturity earlier than their forebears,which allows them to reproduce more and spread faster.The invaders are also eating well:a diversified diet of native insects, algae,and zooplankton. Despite Brazil's ban on sales of the fish,stores all over the country sell them as pets.They may soon colonize other parts of the country.Tuckett says it should be"a wake-up cal