Unit 7 Let’s be “Diverse” Before You Read Some people believe that if bees become extinct, humans will have no more than four years to live on Earth. What makes them believe such a prediction? The pictures below (A-E) describe some possible consequences of the extinction of bees. Put these pictures into correct order, and then share your answers with the class. The first one has been done for you. A. B. C. D. E. __D__ → _____ → _____ → _____ → _____ Reading Reading Task: Find out the three elements of “biodiversity” and the respective definition of each element. Some people believe that if bees disappear off the face of the earth, humans will have only four years left to live. Although the prediction may seem astonishing, it is in fact highly probable. Bees, the insects that qualify as the best pollinators in nature, carry pollen from plant to plant in their daily search for food. If there were no bees, most plants would not be fertilized and thus would fail to reproduce; as a result, the products of these plants would be unavailable for humanity to use as food, for clothing, in medicines, and for fuel. If bees became extinct, crop yields would fall abruptly, inevitably causing food shortages to arise around the world. Hence, it is no exaggeration to say that bees are of the utmost importance to human survival. Unfortunately, there has been a steep decline in the bee population since the 1970s. Human activity has destroyed the natural habitats of many species, one of which is the bees’ natural habitat. Agricultural practices, especially the use of pesticides, are one of the contributing factors in this destruction. Some people have therefore proposed artificial pollination. Though it sounds feasible in some ways, the truth is that a worker bee flies among at least 5,000 flowers a day, with more than ten thousand grains of pollen attached to its body hair. Worker bees pollinate plants so efficiently that science and technology alone simply can’t compare. What’s worse, most people are not aware of the even more acute crisis behind the disappearance of bee colonies—that is, the severe imbalance in the ecology. Flora, fauna, and microorganisms of all species have important roles to play in the natural balance of life on Earth. The different organisms, together with the environment they live in, form what is called an “ecosystem,” which consists of various genetic formations, species, and habitats. To maintain the balance of ecosystems, biodiversity is the key. To be exact, biodiversity includes three aspects: genetic diversity, species diversity, and habitat diversity. Genetic diversity means that different genes exist in each member of a particular species, which can prevent the species from becoming extinct when the environment changes. Species diversity is the elaborate network made up of different species that sustains the balance of an ecosystem. Habitat diversity refers to varied natural environments that provide different habitats for species to grow and develop. Healthy biodiversity insures the balance of an ecosystem and the continued survival of all the life within it. Nevertheless, over the centuries, human beings have done great damage to the planet’s biodiversity, and it can hardly be recovered. Why is it important for people to conserve biodiversity? The Great Famine in Ireland in the nineteenth century served as a classic example. For the sake of greater yields, humans had long gotten used to planting only one staple crop in an area, which reduced genetic diversity. When a potato blight hit Ireland, the locals had a very bad harvest of the type of potato they had lived on. The famine eventually took around one million lives and forced another million to emigrate. If the Irish had planted several different potato species, some potato species might have been resistant to this disease, and the disaster would have been less grave—or perhaps would not have even occurred. It is thus apparent that biodiversity is of great importance to all living things. However, in spite of the lesson from the Great Famine, the tendency to grow certain cash crops or fruits continues today, and so does the destruction of biodiversity. As biodiversity keeps decreasing, humans will certainly suffer the consequences in the near future. And in the long term, survival will be a difficult task for human beings, not to mention all the other species on the planet. Consequently, retaining biodiversity is not simply about saving plants and animals. It is actually about saving ourselves and our offspring. —Liu Kuan-miao After You Read Reading Map Fill in the following blanks with the items (A-G) in the box below. (A) an elaborate network made up of different species that sustains the balance of an ecosystem (B) slightly different genes in each member of a particular species, which can help save the species from becoming extinct when its living environment changes (C) Humans had long gotten used to planting only one staple crop in an area, which reduced the level of genetic diversity. (D) varied natural environments that provide different habitats for species to grow and develop (E) Crop yields would fall abruptly, and food shortages would surely arise. (F) A million Irish people were forced to emigrate. (G) The natural habitats of bees have been destroyed by human activity. habitat diversity: 1________ Healthy biodiversity can insure the balance of a certain ecosystem and the survival of all the life within it. species diversity: 2________ Hypothesis (假說): The extinction of bees genetic diversity: 3________ Possible factor: ________ Example: The Great Famine in Ireland in the 19th century Possible consequences: ‧Plants would not be able to be fertilized and Background: 6________ Cause: A potato blight hit Ireland. reproduce. ‧Human would not be able to use these plants Effects: ‧Around one million Irish people died. ‧7________ 4 for foods, clothing, medicine, and fuel. ‧5________ Comprehension Check Choose the correct answer to each question or statement. ( ) 1. Which of the following statements about biodiversity is true? (A) The loss of biodiversity in an area can strengthen the surviving species. (B) Humans greatly increased the earth’s biodiversity in the nineteenth century. (C) Healthy biodiversity supports the survival of all the species within a particular ( ecosystem. (D) Over the centuries, human activity has been the only factor that causes damage to biodiversity. ) 2. According to the reading, low levels of genetic biodiversity will lead to ________ when living environment changes. (A) stronger resistance (B) better harvests (C) fewer chances of extinction (D) fewer chances of survival ( ( ) 3. Which of the following statements about bees is NOT true? (A) Bees, which carry pollen from plant to plant, are the best pollinators in nature. (B) With efficiency, a worker bee can fly among at least 5,000 flowers a day. (C) The use of pesticides has contributed to the destruction of the bees’ habitat. (D) Artificial pollination helps in solving the crisis of the declining bee population. ) 4. According to the reading, which of the following statements is true? (A) It was poor habitat diversity that resulted in the Great Famine. (B) The Great Famine forced two million people to emigrate from Ireland. (C) The Irish did not diversify their staple crops sufficiently in the nineteenth century. (D) The new potato species that some Irish farmers introduced to Ireland caused the famine. ◎Questions for Discussion 1. Why is it important to conserve our planet’s biodiversity? Share your answer with the class. 2. Every April and May, many mountaintops in Taiwan are covered with tung flowers (油桐花). When the tung trees are in blossom, numerous activities and festivals are held, which attract crowds of visitors and benefit the local tourism. However, some other trees have been cut down to make room for these trees. What is your opinion about this? Share your thoughts with the class. Words in Use Words for Production 1. diverse [] adj. different and varied 互異的,多樣化的 ‧This magazine covers a diverse range of topics, from travel and sports to science and technology. diversify [] vi. (diversified | diversified | diversifying) 多樣化,變化 ‧Changes in an area’s natural environment will force the animals and plants there either to diversify or to die off. 2. prediction [] n. [C] something that tells what will happen in the future 言 預測,預 ‧ Ancient people observed the moon closely to make predictions about the weather. 3. qualify [] vi. (qualified | qualified | qualifying) to have all the necessary qualities to be described as something or to receive or do something 符合 (名稱、稱號等),名副其實 ‧ Though Vicky’s first album sold well, it didn’t make her qualify as a superstar yet. She will be a major success if her next albums also sell well. vt. to give someone the ability, skills, and knowledge to do something 使具備資格 ‧ Successfully completing the five-week training course qualifies the students to drive a car. qualification [] n. [C] (usu.pl.) (具備技能或透過經驗而得到的) 資格,資歷 ‧ These days, if job seekers don’t have any qualifications, it is very hard for them to get a good job. 4. reproduce [] vi. to produce young animals or plants 繁殖,生殖 ‧ When female sea turtles are ready to reproduce, they usually swim to the shore to lay their eggs. vt. to make a printed copy of a piece of writing, picture, photo, etc. 翻拍,複製 ‧ The photo of the first quintuplets in America was reproduced on the back cover of the journal. 5. unavailable [] adj. (of a thing) unable to be used, taken, or bought 的,難以取得的 無法購得 ‧ The item you want is unavailable now. It went out of production in 2012. available [] adj. 可購得的,可利用的 ‧ All the train tickets to Hualien are sold out. In other words, there are no tickets available. adj. 有時間的,有空閒的 ‧ The manager is currently away on business, and he won’t be available to meet with you until next week. 6. abruptly [] adv. in a sudden and unexpected way 突然地 ‧ Even though it rained abruptly in the middle of the soccer match, the teams still continued to play. abrupt [] adj. 突然的 ‧ After an abrupt crash, I took my notebook computer to the store to have it examined and repaired. 7. arise [] vi. (arose | arisen | arising) (fml.) (of a problem, a difficult situation, etc.) to begin to happen 發生,出現 ‧ We are prepared to give up all the work we’ve done so far and start all over again, if the need arises. 8. exaggeration [] n. [C] a comment or statement that makes something seem larger, better, worse, or more important than it really is 誇張,言過其實 ‧ It is no exaggeration to say that global warming is affecting all the living things on the planet. exaggerate [] vt. 誇張,誇大 ‧ The company was fined heavily for exaggerating the effectiveness of its products. 9. utmost [] adj. most, highest, or greatest in number, amount, or degree 度的 最大的,極 ‧ When it comes to performing an experiment, safety is always of the utmost importance. utmost [] n. sing. 最大量,極度 ‧ Dealing with the same problem again and again taxed Eunice’s patience to the utmost. 10. steep [] adj. (of an amount) going up or down suddenly and quickly 的,突然的 (數量變化) 急遽 ‧ A war between the oil-exporting countries broke out and caused a steep rise in oil prices worldwide. adj. (of a hill, road, slope, etc.) rising or falling quickly 陡峭的,險峻的 ‧ The steep stairs are extremely difficult for the elderly to use. 11. agricultural [] adj. related to the science or practice of farming 農業的 ‧ Chemical fertilizers, though damaging to human health, are widely used to grow agricultural products today. agriculture [] n. [U] 農業 ‧ With so many advances in agriculture, both the quantity and the quality of the fruits are better than ever before. 12. pesticide [] n. [C] a chemical used for killing insects or small animals, especially those that damage crops or plants 殺蟲劑 ‧ Although pesticides are harmful to nature, they are really helpful in reducing crop losses for farmers. 13. propose [] vt. (fml.) to suggest an idea, an action, or a plan for people to consider 提議,建議 ‧ Since Mr. Jenkins is occupied this afternoon, he has proposed that I give him a call tomorrow morning. proposal [] n. [C] 提議,建議 ‧ Ms. Dorsey rejected my proposal to market the new product in Japan ahead of schedule. 14. feasible [] adj. (of an idea, a method, a plan, etc.) able to be put into practice 的,行得通的 可行 ‧ The government has come up with some feasible ways to respond to the aging population, such as establishing more nursing homes. 15. grain [] n. [C] a very small piece of a particular substance, such as salt, sugar, sand, etc. 顆粒,細粒 ‧ Zack knocked over the salt shaker by accident, making the grains of salt scatter all over the table. n. [C] a single seed of corn, rice, wheat, etc. 穀粒 ‧ The size of this tiny insect is half as small as that of a grain of rice. 16. attach [] vt. to connect or fasten one thing to another 把…附在…上,固定 ‧ A price tag is attached to each item in the store so that the customers do not have to ask anyone about the price. attachment [] n. [C] 附件,附屬物 ‧ If you want to get further details about the project, please refer to the attachment in the e-mail that I just sent to you. 17. acute [] adj. (of sickness, damage, or problems) sudden and serious 嚴重的 ‧ Water pollution caused by the waste discharge from the local factories led to an acute shortage of clean fresh water in the region. 18. ecology [] n. [U] the relation among animals, plants, and people and with the environment 生態,環境 ‧ To be sure, industrial development has brought us comfort and convenience. However, it has also ruined the ecology of the earth. 19. formation [] n. [C] something that has been formed, especially in a particular way 組成物 ‧ Before the typhoon, enormous cloud formations made up a purple mass in the sky. n. [U] the action or process of developing something into a particular way or shape 組成,形 成 ‧ The newly-elected president is working on the formation of a new cabinet. 20. elaborate [] adj. having a lot of complicated details 精密的,複雜的 ‧ London has an elaborate subway system, with more than 400 kilometers of track. 21. network [] n. [C] a system of lines, wires, roads, nerves, etc., that cross one another and are connected to one another 網狀系統,網絡 ‧ The network of roads in this city is well-developed, making transportation (交通) there very efficient. 22. sustain [] vt. to make something happen or exist continually 使保持,使持續 ‧ Erica is an easygoing person, and she has no trouble sustaining close friendships with other people. 23. famine [] n. [C] a situation in which many people in an area have little or no food to eat for a long time 饑荒 ‧ A large number of people in Mali are facing another famine because of the long, continued drought. 24. emigrate [] vi. to leave one’s own country and go to live in another 移居國外 ‧ Ms. Honda emigrated from Japan to Finland many years ago. Now, she visits her friends in Osaka every other year. emigration [] n. [U] 移居國外 ‧ In the twentieth century, emigration from some countries, like North Korea, was not allowed. emigrant [] n. [C] 移居國外者,移民 ‧ The emigrants are enjoying their new lives in Australia. Some of them have even started to regard Australia as their homeland. 25. resistant [] adj. not affected or harmed by something 有抵抗力的 ‧ Some species of mosquitoes have become so resistant to DDT that it cannot kill them anymore. resist [] vt. 抵擋,不受…的損害 ‧ A healthy lifestyle, including regular exercise and proper nutrition, can help one’s body resist many diseases. resistance [] n. [U] 抵抗力 ‧ This seriously ill patient has almost no resistance to infection. Even a slight cold could take his life. 26. retain [] vt. (fml.) to keep or continue having something 保持,持有 ‧ Lorena Ochoa retained the world golf title for more than three years, which is a record that hasn’t yet been broken. 27. offspring [] n. [C] (pl. offspring) one’s children, grandchildren, or great-grandchildren, etc. 子孫,後代 ‧ Many parents have trouble successfully communicating with their teenage offspring because of the generation gap. Words for Recognition 1. pollinator [] n. [C] an insect or animal that spreads pollen among plants so that they can reproduce 授粉媒介,傳粉昆蟲 pollinate [] vt. 給 (植物、花) 傳授花粉 pollination [] n. [U] (植物) 授粉 pollen [] n. [U] 花粉 2. flora [] n. pl. the plants that grow in a particular area 植物群 3. fauna [] n. pl. the animals that live in a particular area 動物群 4. microorganism [] n. [C] a very small living thing that can be seen only with a microscope 微生物 5. ecosystem [] n. [C] the total of the animals and plants in a certain area along with their relationships to one another and to the environment 生態系統 6. biodiversity [] n. [U] (= biological diversity) the degree of the variety of living things in a certain natural environment 生物多樣性 diversity [] n. [U] 多樣化 7. blight [] n. [U][C] a serious crop disease that often makes plants dry up and die 枯萎病 8. cash crop [] n. [C] a crop that farmers grow in order to sell 經濟作物 Idioms and Phrases 1. disappear off the face of the earth: to disappear completely or cannot be found anywhere 消失得無影無蹤 ‧ The ship and its crew seemed to have disappeared off the face of the earth when it passed through the Bermuda Triangle. 2. in some ways: to some extent 某種程度上 ‧ Though Mr. Spacey doesn’t take charge of the company, he still has to be responsible for the wrong decision in some ways. 3. something can’t/doesn’t compare (with something else): something that is not as good as something else 不能 (與某事物) 相比 ‧ Cookies only satisfy hunger for a short while; they can’t really compare with a full meal. 4. together with . . .: in addition to someone or something 連同…,和…一起 ‧ The white dress, together with the black belt, costs only NT$900. 5. for the sake of something: in order to get or achieve something 為了獲得某物 ‧ Jimmy doesn’t like his job at all; he continues to do this job simply for the sake of money. 6. in the long term: used to talk about what will happen after a long period of time in the future 從長期來看 ‧ Skipping meals might not bring about serious problems right now, but in the long term, it may lead to eating disorders (飲食失調). 7. not to mention something: used to add extra information to emphasize what has just been mentioned 更不用說… ‧ The earthquake caused the widespread destruction of buildings, not to mention a good deal of human suffering. Word File I. The prefix “eco-” The prefix “eco-” is put at the beginning of a noun or an adjective. It means “relating to the environment.” Sometimes, there is a hyphen after this prefix. system → ecosystem tourism → ecotourism label → eco-label disaster → eco-disaster friendly → eco-friendly sensitive → eco-sensitive II. The prefix “pre-” The prefix “pre-” can be added to form a noun, a verb, or an adjective. It means “before.” prediction 預測 preheat 預熱 premature 早產的 precaution 預防措施 preview 預習 prehistoric 史前的 Patterns in Use 1 S + V1 + N, one/part/some/many/most/both/all/none + of + which/whom + be/V2 . . . Examples: ‧Human activity has destroyed the natural habitats of many species, and one of these natural habitats is the bees’ natural habitat. → Human activity has destroyed the natural habitats of many species, one of which is the bees’ natural habitat. ‧Ms. Douglas has two children, and both of them have a talent for art. → Ms. Douglas has two children, both of whom have a talent for art. Exercise A: Rewrite the following sentences by using the pattern on page 163. 1. Stella bought two books, and both of them were adventure novels. → ___________________________________________________________________________ 2. The store has hired several young clerks, and none of them is above 30. → ___________________________________________________________________________ 3. At the party, Ted chatted with many people, and some of them were his high school classmates. → ___________________________________________________________________________ 4. There are many convenience stores in Taiwan, and most of them are equipped with ATMs. → ___________________________________________________________________________ ◎Exercise B: Henry (“H”) and Norman (“N”) are gossiping about James. Complete their conversation by using the sentences in the box below and the pattern on page 163. The first one has been done for you. ‧Most of his friends are fair-weather friends. ‧All of the three houses were sold within five years. ‧Some of the gossip is about your neighbor, James. ‧Two of his girlfriends even work in the same company. ‧One of the reasons was that he fell in love with his boss’s daughter. H: Norman, have you heard the latest gossip, 1__some of which is about your neighbor, James__? N: James? I’ve heard he got fired for several reasons, 2________________________. H: It serves him right. You know, he’s got at least four girlfriends, 3________________________. N: It seems that he falls in love easily and doesn’t know how to say “no” to girls. H: Well, I know he is popular, but I’m not sure if people really like him or are that loyal to him. He’s got lots of friends, 4________________________. N: Rumor has it that when his mother passed away, she left him three houses, 5 ________________________. H: If his mother were alive, James would surely drive her crazy. 2 with + O + OC (V-ing/p.p.) Examples: ‧A worker bee flies among at least 5,000 flowers a day, with more than ten thousand grains of pollen attached to its body hair. ‧Gloria stood at the window, with her long hair blowing in the breeze. ◎Exercise A: Rewrite the following underlined parts by using the above pattern. When the environment changes, this changes ecological systems and causes the evolution of different species. However, 1if the environment changes too rapidly, ecosystems and species will not have enough time to adapt, which, as a result, weakens biodiversity. Unfortunately, human activity is creating this form of environmental change by discharging large quantities of carbon dioxide into the atmosphere. 2More and more carbon dioxide is trapped in the atmosphere, and that has led the temperature on Earth to rise very quickly. This has brought about biodiversity loss in biomes (生物 群系) around the globe. For example, in the polar regions, 3as more and more floating sea ice has melted, polar bears are no longer able to find a place to rest when they are swimming long distances searching for food, and many of them have drowned from exhaustion. Similarly, other species living on the sea ice are also at the risk of extinction. The sea itself has also been affected. 4The ocean has become more acidic (酸的) because more carbon dioxide has been absorbed in it. Ocean acidification (酸化) either disables sea creatures’ ability to form their shells and skeletons (骨骼) or wears away the shells that are already formed, leaving mollusks (軟體動物) with no protection. 1. ______________________________________________________________________________ 2. ______________________________________________________________________________ 3. ______________________________________________________________________________ 4. ______________________________________________________________________________ Exercise B: Complete the following sentences according to the Chinese by using the pattern on page 165. 1. Dylan 躺在草地上,雙手交叉放在頭下,看著星星在天空中閃爍。 → Lying on the grass _______________________, Dylan stared at the stars twinkling in the sky. 2. 經理手中拿著公事包匆忙地走進辦公室。 → The manager walked into the office in a hurry _____________________________________. 3. Ruth 懇求我的原諒,眼淚從臉上流下來。 → ________________________________________________, Ruth begged for my forgiveness. 4. 心跳越來越快,Mandy 步上舞臺,開始唱歌。 → ___________________________________, Mandy stepped onto the stage and began to sing. Beyond the Text Ocean Overfishing Listen to the passage about overfishing (過度捕撈) and then choose the correct answer to each of the following questions. ( ) 1. According to the passage, when did overfishing first occur? (A) In the early 1800s. (B) In 1989. (C) In the mid-19th century. (D) In 2006. ( ( ) 2. Why did governments around the world in the mid-2000s encourage fishing? (A) People liked fishing. (B) People needed lamp oil. (C) People needed nutrition. (D) People needed fishing boats. ) 3. Where is this passage most likely to be seen? (A) In a cookbook. (B) In a science magazine. (C) In a hymnbook. (D) In a medicine journal. A Food Web in the Rain Forest The following picture shows a food web in the rain forest. Take a close look at it, and then answer the questions on the next page. Share your answers with the class. Vocabulary Bank 1. bacterium [] n. [C] 細菌 2. fungus [] n. [C] (pl. fungi) 真菌 3. mammal [] n. [C] 哺乳類 4. amphibian [] n. [C] 兩棲類 5. reptile [] n. [C] 爬蟲類 1. The food web in the picture shows several food chains. Pick one of them and describe how that food chain helps balance the ecosystem. 2. Over the past few decades, many tropical rain forests have been destroyed. Which plants or animals do you think are threatened? Will the destruction of the rain forests have any impact on humans? Why or why not? Writing Hands-on Definition A definition explains the meaning of a word or term. Some terms are concrete (具體的) and have definite meanings; others are abstract (抽象的) and the definition may differ from person to person, such as “happiness,” “love,” “hope,” etc. Using definition is one of the strategies to develop the content. The following are some approaches to defining a term. ‧Explain what it is or what should be done to achieve it. ‧Explain how it works and how it is organized. ‧Link it to something familiar to make the term easier to understand. ‧Contrast it with something else, so differences between the two clarify the meaning. ‧Use facts, information, examples, personal experience, or stories to support the definition. Examples: ‧Ecosystem: The different organisms, together with the environment they live in, form what is called an “ecosystem,” which consists of various genetic formations, species, and habitats. ‧Biodiversity: Biodiversity includes three aspects: genetic diversity, species diversity, and habitat diversity. ‧Genetic diversity: Genetic diversity means that different genes in each member of a particular species, which can prevent the species from becoming extinct when the environment changes. ‧Species diversity: Species diversity is the elaborate network made up of different species that sustains the balance of an ecosystem. ‧Habitat diversity: Habitat diversity refers to varied natural environments that provide different habitats for species to grow and develop. ‧Imbalance in the ecology: ( by taking the disappearance of bees colonies as an example) All species on Earth have important roles to play. Take bees, for example. They carry pollen from plant to plant in their daily search for food. If bees became extinct, crop yields would fall abruptly, inevitably causing food shortages to arise around the world. Hence, the disappearance of bee colonies is causing a severe ecological imbalance. Exercise A: Define each of the following terms in two different ways. 1. growing up (A) ___________________________________________________________________________ (B) ___________________________________________________________________________ 2. happiness (A) ___________________________________________________________________________ (B) ___________________________________________________________________________ 3. a true friend (A) ___________________________________________________________________________ (B) ___________________________________________________________________________ Transitional words or phrases that are often used in a definition paragraph can be categorized as follows: (A) Showing similarity: like, in the same way, similarly, as, just as, in other words, that is, that is to say, to put it another way, . . . (B) Showing difference: unlike, on the contrary, by/in comparison, by/in contrast, . . . (C) Indicating addition: besides, in addition, moreover, furthermore, . . . (D) Giving examples: such as, for example/instance, take . . . as an example, . . . Exercise B: I. Using the information given above to write a paragraph to define the term “ecosystem.” Follow the structure in the table below. Introduction What is an ecosystem? Supporting idea What is the imbalance in the ecology? What are the results of ecological imbalance? Take bees, for example. Conclusion What is biodiversity and what is its importance? ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ II. Choose one of the following terms: growing up, happiness, and a true friend. Write a definition paragraph about it. ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________