Module5 Cloning
Ⅰ.阅读理解
阅读下列短文,从每题所给的A、B、C和D四个选项中,选出最佳选项。
A
(2017课标全国Ⅱ,D)
When a leafy plant is under attack, it doesn’t sit quietly. Back in 1983, two scientists, Jack Schultz and Ian Baldwin, reported that young maple trees getting bitten by incts nd out a particular smell that neighboring plants can get. The chemicals come from the injured parts of the plant and em to be an alarm. What the plants pump through the air is a mixture of chemicals known as volatile organic compounds, VOCs for short.
Scientists have found that all kinds of plants give out VOCs when being attacked. It’s a plant’s way of crying out. But is anyone listening?Apparently. Becau we can watch the neighbors react.
Some plants pump out smelly chemicals to keep incts away. But others do double duty. They pump out perfumes designed to attract different incts who are natural enemies to the attackers. Once they arrive, the tables are turned. The attacker who was lunching now becomes lunch.
恪尽职守
In study after study, it appears that the chemical conversations help the neighbors. The damage is usually more rious on the first plant, but the neighbors, relatively speaking, stay safer becau they heard the alarm and knew what to do.
Does this mean that plants talk to each other?Scientists don’t know. Maybe the first plant just made a cry of pain or was nding a message to its own branches, and so, in effect, was talking to itlf. Perhaps the neighbors just happened to“overhear”the cry. So information was exchanged, but it wasn’t a true, intentional back and forth.
Charles Darwin, over 150 years ago, imagined a world far busier, noisier and more intimate(亲密的)than the world we can e and hear. Our ns are weak. There’s a whole lot going on.
1.What does a plant do when it is under attack?
A.It makes nois.
行政管理就业前景B.It gets help from other plants.
C.It stands quietly.
D.It nds out certain chemicals.
2.What does the author mean by“the tables are turned”in paragraph 3?
A.The attackers get attacked.
B.The incts gather under the table.vipkid怎么样
英语格言警句
C.The plants get ready to fight back.
D.The perfumes attract natural enemies.
3.Scientists find from their studies that plants can .
A.predict natural disasters
B.protect themlves against incts
C.talk to one another intentionally
D.help their neighbors when necessary
4.What can we infer from the last paragraph?
etd是什么意思A.The world is changing faster than ever.
B.People have stronger ns than before.
C.The world is more complex than it ems.
D.People in Darwin’s time were more imaginative.
B
(2017福建泉州一中模拟,C)
“De-extinction”,the idea that extinct(绝种的)animals can be brought back through cloning or genetic(基因的)engineering,has attrac
ted the interest of a small group of scientists.The topic has made the cover of National Geographic Magazine.Supporters say they are doing it for moral reasons,becau we“miss”the extinct animals.They blame human exploitation (such as trapping,hunting,habitat destruction) of the extinct animals,but their plans,though they sound exciting,are exploitation in another form.
geography怎么读Considering the imperfect science of cloning,de-extinction would cau animals’ suffering.Most animals born in such experiments would suffer rious dias,dying soon after birth or having a shortened lifetime.Spanish and French scientists worked for years to bring the Pyrenean ibex,a species of wild goat,back from extinction by cloning.In 2009,they succeeded only in producing a sick baby goat that died 10 minutes after birth.For the animals to be born,other animals would live in captivity,in a lab or elwhere,and rve as mother substitutes(代用品),routinely having operations as part of the cloning process.For example,elephants would be kept in captivity to carry woolly mammoth(猛犸)babies for nearly two years.Such experiments often lead to other animals’ unhappiness as well.
If extinct animals are successfully brought back,where would they go?Their original habitats have developed and changed without them.They are unlikely to survive in the natural environment,but,if they do manage to survive,they will affect their environment in unpredictable ways,prenting a new threat to the ecological system.If the animals born through de-extinction are stuck in zoos and muums instead,what good is that?It is exploitation,not a solution.
It would be better to apply creative thinking about protection to the real-life problems of today’s world.De-extinction takes attention away from the difficult situation of endangered animals.Discussions about woolly mammoth cloning do nothing to stop the illegal killings of endangered wild African elephants.Money would be better ud to prevent human conflict with wildlife and their ecosystems.
高一英语周报答案Let’s keep de-extinction in the world of science fiction,learn from our failed past,and protect wild animals and their habitats for the future.
5.The underlined word“it”in Paragraph 1 refers to“ ”.
A.de-extinction
B.cloning or genetic engineering
C.exploitation
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D.National Geographic Magazine
6.In Paragraph 2, examples are given to show that . inprogress
abitA.modern elephants are related to woolly mammoth
B.scientists should improve the cloning process
