Some significant population changes are associated with modernization
人口的改变英文作文
人口的改变英文作文英文回答：Population change is a multifaceted phenomenon that can have profound implications for individuals, communities,and the global community at large. While the specific dynamics of population change vary depending on the context, there are some general trends that have been observedacross different populations and regions.One of the most significant aspects of population change is the rate of natural increase (RNI). The RNIrefers to the difference between the birth rate and the death rate in a given population. A positive RNI indicates that the population is growing, while a negative RNI indicates that the population is shrinking. The RNI can be influenced by a variety of factors, including access to healthcare, economic conditions, and social norms.Another important aspect of population change ismigration. Migration involves the movement of people from one place to another, either temporarily or permanently. Migration can be driven by factors such as economic opportunity, political instability, environmental disasters, or family reunification. It can have significant impacts on the demographic composition and social fabric of both the sending and receiving communities.In addition to natural increase and migration, population change can also be affected by demographic transitions. A demographic transition is a shift in the age structure and fertility patterns of a population thatoccurs over time. Demographic transitions are typically characterized by a decline in fertility and mortality rates, as well as an increase in the proportion of elderly individuals. These transitions can have implications for labor force participation, healthcare systems, and social welfare programs.Population change can have a variety of impacts on society. For example, population growth can lead to increased demand for resources, such as housing, food, andenergy. It can also lead to increased competition for jobs and other resources. Population decline, on the other hand, can lead to a shrinking labor force and a decline in economic growth. It can also lead to social isolation and a loss of cultural identity.Understanding the dynamics of population change is essential for developing effective policies and programs that address the challenges and opportunities associated with this phenomenon. By considering the factors that drive population change, and by anticipating the potential impacts of these changes, governments and other stakeholders can take steps to mitigate negative consequences and maximize positive outcomes.中文回答：人口变化是一个多方面的现象，它对个人、社区和整个国际社会都可能产生深远的影响。
城市化对生物多样性的影响英语作文
城市化对生物多样性的影响英语作文Title: The Impact of Urbanization on BiodiversityIn the modern era, urbanization has become a prominent feature of global development. Cities are expanding at an unprecedented rate, transforming natural habitats into concrete jungles. This rapid urban growth has significant implications for biodiversity, which refers to the variety of life in the world. As we continue to reshape our environment, it is essential to understand how this process affects the delicate balance of nature.One of the most immediate impacts of urbanization is habitat loss. As cities expand, they often encroach upon forests, wetlands, and other natural areas that are home to countless species. These habitats provide food, shelter, and breeding grounds for wildlife. When they are destroyed or fragmented, many species struggle to survive. Some may even face extinction if they cannot adapt to the new conditions or find alternative habitats.Urbanization also leads to increased pollution, both in the air and water. Chemicals from industrial processes, vehicleemissions, and household waste can contaminate the environment, making it more challenging for plants and animals to thrive. Pollution can cause respiratory problems in birds and mammals, while aquatic species may be harmed by toxic substances in their water sources.Furthermore, urban environments often result in higher temperatures due to the heat island effect, where cities trap and retain heat more than rural areas. This temperature rise can disrupt the life cycles of many organisms, such as migratory patterns of birds and the hibernation habits of certain animals. The change in temperature can also affect plant growth and flowering times, which in turn influences the availability of food for pollinators like bees and butterflies.However, it is not all doom and gloom for biodiversity in urban settings. Cities can actually provide new opportunities for some species to adapt and flourish. For example, some bird species have found urban rooftops to be ideal nesting sites, free from ground-dwelling predators. Gardens and parks within cities offer refuge to various insects and small mammals, providing them with necessary resources like food and shelter.To mitigate the negative effects of urbanization on biodiversity, there are steps that can be taken. Green spaces within cities should be protected and expanded to create corridors for wildlife movement. Sustainable practices in construction and waste management can reduce pollution levels. Additionally, community involvement through initiatives like tree planting and creating wildlife-friendly gardens can contribute significantly to preserving biodiversity in urban areas.In conclusion, while urbanization poses challenges to biodiversity, there is hope for coexistence between human development and the natural world. By understanding these challenges and implementing thoughtful solutions, we can work towards a future where cities are not just centers of human activity but also havens for diverse forms of life.。
雅思写作islip范文
雅思写作islip范文Task 1: Report on Islip Population Changes.Islip is a place that has seen some rather interesting populationtrends over the years. Let's have a closer look at the data.In the year 2000, the population of Islip was a modest 10,000 people.It was like a small, cozy community where everyone sort of knew everyone else. The town was filled with little family run shops and quiet neighborhoods.However, things started to change. By 2010, the population hadincreased to 15,000. What caused this jump? Well, there were a few things. New job opportunities sprang up in nearby industrial areas. You know how it is when there are jobs, people come flocking in. Also, the local councilhad started to improve the infrastructure. There were new roads being built, and the public transport got a bit better. This made Islip more accessible and appealing to people from the surrounding areas.Then, in 2020, the population reached 20,000. This was a significant increase in just a decade. One of the main reasons was the expansion of educational facilities. A couple of really good schools were established in Islip. Parents are always on the lookout for good places to educate their kids, right? So families moved in for the sake of their children's education. Another factor was the growth of the housing market. New housing estates were built, offering a variety of homes from small apartments to large family houses.Looking at the age distribution, in 2000, there was a fairly even spread, but as the population grew, there was a notable increase in the number of young families. This is probably due to the factors we've alreadymentioned jobs, schools, and housing. The older population also grew slightly, but not at the same rate as the younger ones.In conclusion, Islip has transformed from a small town of 10,000 to a bustling community of 20,000 in two decades. It will be really interestingto see how its population continues to change in the future, depending on how the local economy, education, and housing situations develop.Task 2: Opinion Essay on "Islip's Development Positive or Negative?"Islip's development over the years is like a double edged sword. It has both good and bad sides, and let me tell you all about it.On the positive side, the growth in population and development has brought a lot of vitality to Islip. First of all, the increase in job opportunities is a huge plus. People who used to struggle to find work in their hometowns now have a chance to earn a living in Islip. It's like a new lease on life for them. The new schools that have been built are also great. Education is the key to the future, and with better educational facilities, the kids in Islip have more opportunities to learn and grow. They can dream bigger and aim for better careers.The improvement in infrastructure is something that everyone can enjoy. The new roads make it easier to get around, whether you're driving to work or just going for a Sunday drive. And the better public transport meansthat people can save money on gas and reduce pollution too. It's also niceto see the housing market booming. There are more options for people tolive in, whether you're a young single person looking for a small flat or a big family in need of a spacious house.However, there are some negative aspects too. With the increase in population, Islip has lost some of its old charm, small town feel. You know,those days when you could walk down the street and say hello to everyone you passed by? It's not as common anymore. There's more traffic now, which means more noise and pollution. The once quiet streets are now filled with the hustle and bustle of cars and people.Another problem is the strain on local resources. The schools might be new, but they are getting overcrowded. The teachers have to deal with more students, and it might be harder to give each child the individualattention they need. The local hospitals and clinics also face more pressure. There are more patients, and the waiting times might increase.In my opinion, overall, Islip's development has been more positive than negative. But it's important to manage the growth carefully. The local council should focus on preserving some of the town's charm while still allowing for progress. They need to make sure that the infrastructure can keep up with the growing population, and that the local resources are not stretched too thin. If they can do that, Islip can continue to be a great place to live, work, and raise a family.。
人口变化英文作文
人口变化英文作文Population change is a complex phenomenon that is influenced by a variety of factors. In some countries, the population is rapidly increasing due to high birth ratesand improved healthcare, while in others, it is decliningas a result of low birth rates and emigration. This canhave significant social, economic, and environmental implications.Rapid population growth can put a strain on resources and infrastructure, leading to overcrowding and increased competition for jobs and housing. It can also lead to environmental degradation and the depletion of natural resources. On the other hand, declining populations can result in labor shortages, an aging workforce, andincreased healthcare and pension costs.Government policies, social attitudes, and economic conditions can all play a role in shaping population trends. For example, pro-natalist policies such as financialincentives for having children can encourage population growth, while anti-natalist policies such as family planning and contraception programs can help to slow it down.In some cases, natural disasters, conflicts, or other crises can lead to sudden and dramatic changes in population. For example, a war or a famine can cause mass displacement and migration, leading to a rapid increase in population in some areas and a decrease in others.Globalization and advances in technology have also had a significant impact on population change. Increased mobility and access to information have made it easier for people to move to new areas in search of better opportunities, leading to shifts in population distribution and demographics.In conclusion, population change is a complex and multifaceted issue that is influenced by a wide range of factors. It is important for policymakers to consider the social, economic, and environmental implications ofpopulation change in order to develop effective strategies for managing and adapting to these changes.。
英语作文乡村变化及其产生的原因
英语作文乡村变化及其产生的原因全文共3篇示例，供读者参考篇1The Transformation of Rural Life and Its Driving ForcesGrowing up in a small village in the heart of the countryside, I have witnessed firsthand the profound changes that have reshaped rural life over the past decade. What was once a serene and self-sufficient hamlet, deeply rooted in tradition and agriculture, has gradually transformed into a community caught between the tides of modernity and the lingering echoes of its pastoral past.The most striking change, perhaps, has been the exodus of the younger generation. As economic opportunities dwindled in our sleepy village, an increasing number of my peers have sought greener pastures in the bustling cities, lured by the promise of higher-paying jobs, better education, and a more vibrant social life. This brain drain has left our community with a disproportionately aging population, straining local resources and threatening the continuity of long-held traditions.Another significant shift has been the gradual decline of traditional farming practices. Once the lifeblood of our village, agriculture has become increasingly challenging due to a confluence of factors. Climate change has disrupted weather patterns, leading to unpredictable droughts and floods that have devastated crops. The rising costs of seeds, fertilizers, and equipment have made it harder for small-scale farmers to turn a profit. Moreover, the allure of urban employment has eroded the agricultural workforce, leaving fields fallow and farms understaffed.As traditional livelihoods have waned, our village has increasingly turned to alternative economic strategies. Some enterprising residents have capitalized on the growing trend of rural tourism, offering city-dwellers a taste of the countryside through farmstays, agritourism ventures, and quaintbed-and-breakfasts. Others have tapped into the burgeoninge-commerce market, selling locally produced goods such as handicrafts, artisanal foods, and handmade wares to a global audience through online platforms.The influx of outside influences has also reshaped the cultural fabric of our community. The arrival of high-speed internet and smartphones has connected our once-isolatedvillage to the wider world, exposing residents to new ideas, trends, and lifestyles. While this has broadened our horizons and provided access to a wealth of information, it has also challenged longstanding traditions and values. Younger generations, in particular, have embraced modern pop culture and urban fashions, sometimes clashing with the more conservative elders who cling to the village's traditional ways.Infrastructural developments have further transformed the landscape of our rural enclave. The construction of new roads, bridges, and transportation links has improved connectivity with neighboring towns and cities, facilitating the flow of goods, services, and people. However, this increased accessibility has also brought unwelcome intrusions, such as noise and air pollution from traffic, as well as the encroachment of urban sprawl on our once-pristine natural surroundings.Despite these changes, our village has retained its unique charm and resilience. The warmth and hospitality of its residents, the rich tapestry of local customs and festivals, and the enduring bond with the land have endured, even as the world around us shifts. Elders regale younger generations with tales of bygone days, preserving the collective memory of our community and instilling a sense of pride in our heritage.As I reflect on the transformations witnessed in my lifetime, I am struck by the complex interplay of forces that have shaped our rural reality. The push and pull of economic factors, technological advancements, environmental challenges, and cultural influences have converged to create a landscape that is both familiar and foreign, a delicate balance between the old and the new.While some may lament the passing of the traditional rural way of life, others embrace the changes as necessary adaptations to a rapidly evolving world. Ultimately, the future of our village, and indeed rural communities worldwide, will hinge on our ability to navigate these transitions with wisdom and foresight, preserving the essence of our heritage while embracing the opportunities presented by progress.As a student poised to embark on my own journey beyond the boundaries of our village, I carry with me a deep respect for my roots and a determination to honor the resilience and ingenuity that have sustained our community through centuries of change. For in the tapestry of our rural transformation lies a profound lesson – that the true strength of a people lies not in resisting the currents of change, but in adapting and evolvingwhile holding fast to the values and traditions that anchor us to our shared humanity.篇2Changes in the Countryside and the Driving Forces Behind ThemEver since I was a young child, I've had the chance to spend time in rural areas during summer vacations, visiting my grandparents in their village. Those were some of the most cherished memories of my childhood – running through the fields, helping my grandfather tend to the crops and livestock, and enjoying the simple pleasures of life away from the hustle and bustle of the city. However, with each passing year, I couldn't help but notice the vast changes sweeping through thoseonce-tranquil rural landscapes, transforming them into something almost unrecognizable. In this essay, I aim to explore the myriad shifts occurring in the countryside and delve into the underlying causes propelling these transformations.One of the most apparent changes has been the gradual depopulation of rural areas. As economic opportunities dwindled in villages and small towns, a significant portion of the younger generation sought greener pastures in larger cities. Theallure of better-paying jobs, access to higher education, and a more vibrant social life proved too strong a pull for many to resist. Consequently, numerous villages have witnessed an exodus of their youth, leaving behind an aging population to tend to the fields and maintain the traditional way of life.This demographic shift has had far-reaching implications, including a decline in agricultural productivity. With fewerable-bodied individuals available to work the land, many farms have struggled to maintain their output. Furthermore, the loss of young talent has deprived these communities of innovative ideas and fresh perspectives, potentially stifling their ability to adapt to changing times and market demands.Another significant change has been the encroachment of urban sprawl on rural landscapes. As cities continue to expand their boundaries, once-fertile farmlands and pristine natural areas have given way to housing developments, industrial parks, and commercial centers. This phenomenon, often driven by population growth and economic development, has not only reduced the amount of arable land available for agriculture but has also contributed to environmental degradation and the fragmentation of ecosystems.The impact of urbanization on rural communities extends beyond the physical transformation of the landscape. The influx of urban residents into formerly rural areas has brought with it a clash of cultures and values. Traditional customs and ways of life that have been passed down for generations are increasingly being challenged by more modern, urban-centric perspectives. This cultural dissonance has the potential to erode the unique identities and social fabrics that once defined these communities.Technological advancements have also played a significant role in reshaping the rural landscape. The advent of mechanized farming equipment and advanced agricultural techniques has revolutionized the way crops are cultivated and livestock is raised. While these innovations have undoubtedly increased productivity and efficiency, they have also led to a decline in the demand for manual labor, further exacerbating the issue of rural depopulation.Moreover, the proliferation of communication technologies and improved infrastructure has bridged the gap between urban and rural areas, blurring the boundaries that once clearly separated them. Rural residents now have access to the same information, entertainment, and services as their urbancounterparts, potentially diminishing the perceived need to migrate to cities in search of such amenities.Climate change and environmental degradation have also taken a toll on rural areas, posing significant challenges to traditional agricultural practices. Shifting weather patterns, prolonged droughts, and the depletion of natural resources have made it increasingly difficult for farmers to maintain their livelihoods. These environmental pressures have forced many to abandon their ancestral lands and seek alternative means of sustenance.While the changes occurring in the countryside may seem daunting, it is important to recognize that they are not solely driven by external forces but also by the choices and aspirations of rural residents themselves. The pursuit of economic opportunities, access to better education and healthcare, and a desire for a more cosmopolitan lifestyle have all contributed to the migration of youth from rural to urban areas.However, it would be short-sighted to view these changes as inherently negative or as a one-way street. In recent years, there has been a growing countermovement, with some individuals and families choosing to leave the fast-paced urban life behind and embrace a more rural existence. This "rural renaissance" hasbeen fueled by a desire for a slower pace of life, a closer connection to nature, and a yearning for a sense of community that may have been lost in the anonymity of cities.Furthermore, the challenges faced by rural communities have also sparked innovative solutions and grassroots initiatives aimed at revitalizing these areas. From the promotion of sustainable agriculture and eco-tourism to the development of small-scale industries and the preservation of cultural heritage, there are concerted efforts to address the issues plaguing the countryside while capitalizing on its unique strengths and resources.As I reflect on the profound changes that have reshaped the rural landscapes of my youth, I am struck by the complexity of the forces at play. Economic, social, technological, and environmental factors have all converged to reshape these once-idyllic settings, challenging the traditional ways of life that have endured for generations.However, amidst these transformations, I am also reminded of the resilience and adaptability of rural communities. Just as they have weathered countless changes throughout history, I am confident that they will find innovative ways to navigate thechallenges of the modern era while preserving the essence of what makes these places so unique and cherished.It is my hope that through thoughtful planning, sustainable development, and a deep appreciation for the cultural and ecological significance of rural areas, we can strike a balance between preserving the heritage of these communities and embracing the changes necessary for their continued prosperity. For it is only by understanding and addressing the multifaceted forces driving these transformations that we can ensure the countryside remains a vibrant and vital part of our collective identity and heritage.篇3The Changing Face of Rural Life and Its Driving ForcesAs a student who was born and raised in a small rural village, I have witnessed firsthand the profound transformations that have reshaped the landscapes and dynamics of my community over the years. The once-tranquil countryside, where life moved at a leisurely pace and traditions held firm, has undergone a metamorphosis that reflects the ever-changing tides of modernization and globalization.One of the most striking changes in rural areas has been the gradual shift from an agrarian economy to a more diversified economic landscape. Historically, the lifeblood of rural communities has been agriculture, with generations of families dedicated to tilling the land and tending to livestock. However, as technology has advanced and global markets have become increasingly interconnected, the primary sectors of rural economies have expanded beyond just farming and livestock rearing.Small-scale industries and manufacturing units have sprouted up in many rural areas, providing employment opportunities that were once scarce. This economic diversification has been driven, in part, by the influx ofurban-based companies seeking to capitalize on the lower overhead costs and availability of land in rural regions. Moreover, rural entrepreneurship has flourished, with local residents launching businesses that cater to the evolving needs of their communities, ranging from eco-tourism ventures to artisanal food production.Another profound change has been the rapid advancement of infrastructure and connectivity in rural areas. Once isolated and disconnected from the rest of the world, many ruralcommunities now boast modern amenities and digital connectivity that have bridged the divide between urban and rural living. Improved transportation networks, such aswell-paved roads and accessible public transportation, have facilitated the movement of goods, services, and people, fostering economic growth and social integration.Additionally, the widespread adoption of high-speed internet and mobile technologies has revolutionized how rural residents access information, conduct business, and stay connected with the world beyond their immediate surroundings. This digital connectivity has opened up new opportunities for education, healthcare, and commerce, effectively shrinking the perceived distance between rural and urban areas.The changes in rural areas have also manifested in significant demographic shifts. Historically, rural communities were characterized by an aging population, as younger generations sought better opportunities in urban centers, leading to a brain drain. However, in。
TPO阅读42文本答案翻译
TPO-42Geographic Isolation of SpeciesBiologist Ernst Mayr defined a species as “an actually or potentially interbreeding population that does notthe separation of a population with its gene pool (all of the genes in a population at any one time) from other populations of the same species, thereby preventing population interbreeding. With its gene pool isolated, a separate population canbeen a geographic barrier. This mode of evolving new species is called allopatric speciation.Many factors can isolate a population geographically. A mountain range may emerge and gradually split a population of organisms that can inhabit only lowland lakes, certain fish populations might become isolated in this way. Similarly, a creeping glacier may gradually divide a population, or a land bridge such as the Isthmus of Panama may form and separate the marine life in the ocean waters on either side.Too many words you don’t know? Look them up in《新托福TPO阅读词汇速查速记》!Wechat: geeqi0805How formidable must a geographic barrier be to keep populations apart? It depends on the ability of the organisms to move across barriers. Birds and coyotes can easily cross mountains and rivers. The passage of wind-blown tree pollen is also not hindered by such barriers, and the seeds of many plants may be carried back and forth on animals In contrast, small rodents may find a deep canyon or a wide river an effective barrier. For example, the Grand Canyon, in the southwestern United States, separate the range of the while-tailed antelop e squirrel from that of the closely related Harris’ antelope squirrel. Smaller, with a shorter tail that is white underneath, the white-tailed antelope squirrel inhabits deserts north of the canyon and west of the Colorado River in southern California Hams' antelope squirrel has a more limited range in deserts south of the Grand Canyon.Geographic isolation creates opportunities for new species to develop, but it does not necessarily lead to newbetween the isolated population and its parent population. The likelihood of allopatric speciation increases when a population is small as well as isolated, making it more likely than a large population to have its gene pool changed substantially. For example, in less than two million years, small populations of stray animals and plants from the SouthAmerican mainland to colonize the Galapagos Islands gave rise to all the species that now inhabit the islands.When oceanic islands are far enough apart to permit populations to evolve in isolation, but close enough to allow occasional dispersions to occur, they are effectively outdoor laboratories of evolution. The Galapagos island chain is one of the world’s greatest showcases of evolution. Each island was born from underwater volcanoes and was gradually covered by organisms derived from strays that rode the ocean currents and winds from other islands and continents. Organisms can also be carried to islands by other organisms, such as sea birds that travel long distances with seeds clinging to their feathers.The species on the Galapagos Islands today, most of which occur nowhere else, descended from organisms that floated, flew, or were blown over the sea from the South American mainland. For instance, the Galapagos island chainhas a total of thirteen species of closely related birds called Galapagos finches. These birds have many similarities but differ in their feeding habits and their beak type, which is correlated with what they eat. Accumulated evidence indicates that all thirteen finch species evolved from a single small population of ancestral birds that colonized one of the islands. Completely isolated on the island after migrating from the mainland, the founder population may have undergone significant changes in its gene pool and become a new species. ■Later, a few individuals of this new species may have been blown by storms to a neighboring island. ■Isolated on this second island, t he second founder population could have evolved into a second new species, which could later recolonize the island from which its founding population emigrated. ■Today each Galapagos island has multiple species of finches, with as many as ten on some islands. ■A. earlyB. crucialC. noticeableD. frequentA. bestB. usualC. firstD. actualYou enjoy the convenience of having all vocabulary questions listed as a separate part in《新托福TPO阅读词汇速查速记》.3. According to paragraph 1, allopatric speciation is possible whenA. a population contains all the different genes present in a species at a particular timeB. a population becomes isolated due to the presence of a geographic barrierC. genetic mixing begins to occur in previously separate populations of a speciesD. a species is successful in crossing a geographic barrier4. How is paragraph 2 related to paragraph 1?A. Paragraph 2 points out a number of ways in which the phenomenon of geographic isolation mentioned in paragraph 1 can occurB. Paragraph 2 identifies discoveries that led to the conclusion presented in paragraph 1 that geographic isolation has played a role in the origin of many speciesC. Paragraph 2 provides evidence supporting the statement in paragraph 1 that a population can follow its own evolutionary course once its gene pool becomes isolatedD. Paragraph 2 explains why the term “allopatric” was adopted to describe the method of speciation described in paragraph 15. In paragraph 3, the author contrasts a variety of organisms to illustrate which of the following points?A. Geographic barriers are less likely to keep apart populations of plants than populations of animalsB. Geographic barriers are more likely to keep apart populations of large organisms than populations of small organismsC. Some members of a species are able to cross geographic barriers, while other members of the same species are notD. The effectiveness of geographic barriers in keeping organisms apart depends on an organism’s ability to move across barriers6. Paragraph 3 supports the idea that white-tailed antelope squirrels and Hams' antelope squirrels have which of the following in common?A. They are the two smallest rodents now found in the southwestern United States.B. They have white coloring underneath their tailsC. They cannot cross the Grand CanyonD. They cannot survive in desert conditionsA. experiencesB. allowsC. preventsD. causes8. Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential informationA. Geographic isolation is sometimes but not always the reason for the creation of reproductive barriers between a parent population and the populations descended from itB. Genetic changes in a geographical isolated population do not necessarily make the population look different enough from its parent population to be considered a new speciesC. Geographical isolation allows the separated populations to evolve independently of each other and so can lead to the formation of new speciesD. Geographic isolation can lead to new species only if the gene pool of the isolated population changes enough to prevent it from reproducing with the parent population9. According to paragraph 4, why does the size of a population affect the likelihood of allopatric speciation?A. Because smaller populations are more likely than larger ones to become geographically isolatedB. Because the gene pool of a small isolated population is more likely to undergo substantial change than is the gene pool of a larger populationC. Because an isolated population can become a new species with substantially less change to its gene pool than would be required by a larger populationD. Because smaller populations are more likely to be made up of stray animals or plants than larger populations areA. were ableB. were forcedC. arrivedD. expanded11. Paragraph 5 supports the idea that the Galapagos island chain was able to become “one of the world's greatest showcases of evolution” primarily because ofA. the richness of the volcanic soil of each of the islands in the chainB. the distance of the individual islands from each other and from the mainlandC. the relativity long time it took for the islands to become covered by organismsD. the outdoor laboratories that scientists have built on the islands to study evolution12. According to paragraph 6, what is true about the thirteen species of Galapagos finches?A. All thirteen species are now found on most of the Galapagos IslandsB. All thirteen species are descended from the same population of ancestral birdsC. All thirteen species evolved on the island that was originally colonized by finches from the mainland.D. All thirteen species occur only in small, completely isolated populations.13. Look at the four squares [█] that indicate where the following sentence could be added to the passageThis process of speciation and colonization could have been repeated over and over again, gradually involving all the islands in the chain.Where would the sentence best fit? Click on a square to add the sentence to the passage.14. Directions: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. The question is worth 2 points.The geographic isolation of a population can result in the rise of a new species.●●●Answer Choices○ Isolation can result when a geographic barrier forms and splits a population or when a few organisms somehow get carried across an existing geographic barrier and form a new population○ Speciation is more likely when an isolated population is small because significant genetic changes are more likely to occur in a small population than in a large one○ Because of the geographic isolation of the Galapagos Islands, the species that now inhabit them have gene pools that have not changed very much since the islands were first populated.○ Fish populations are more easily isolated by geographic barriers than are populations of most other organisms because fish cannot move across areas where there is no water.○ The Galapagos Islands are well situated for speciation because they provide opportunities for population isolation while also making occasional dispersions between islands possible.○ Evidence indicates t hat the first organisms to reach the Galapagos Islands were probably a small population of finches that, in less than two million years of isolation, evolved into thirteen species.答案：1-5: B C B A D 6-10:C A D B A 11-14: B B C A B EIf you have any questions concerning the texts or answers, feel free to contact Wechat: geeqi0805.If you are tired of looking up TPO words in a dictionary, try《新托福TPO阅读词汇速查速记》!参考译文：物种的地理隔离生物学家厄恩斯特·迈尔将物种定义为“一个可以互相交配或可能互相交配的群体，但这个群体不能与其它生物交配，即便有交配的机会”。
蓝景教育雅思作文
蓝景教育雅思作文一、雅思作文之议论文。
1. 题目示例：“Some people think that zoos are cruel and should be closed down. Others, however, believe that zoos can be useful in protecting wild animals. Discuss both views and give your own opinion.”开头。
Well, you know, zoos have been a bit of a controversial topic lately. Some folks are like, "Zoos? They're just cruel prisons for animals!" But then there are others who think zoos are like superheroes for wild animals. So, let's dig into this.观点一：动物园是残忍的，应该关闭。
On one hand, those who say zoos are cruel have some pretty good points. For starters, some zoos keep animals in really small enclosures. It's like making a human live in a closet all their life. Take the elephants, for example. In some zoos, they barely have enough space to move around. And they can't do the things they would normally do in the wild, like roaming for miles or interacting with a whole bunch of other elephants. It's just not natural. Also, some zoos don't take proper care of the animals. There have been cases where animals are underfed or not given the right medical attention. It's like if you were in a place where they didn't give you enough food or help when you were sick. How would you feel?观点二：动物园有助于保护野生动物。
五年级短篇家乡变化英语作文40词
五年级短篇家乡变化英语作文40词全文共3篇示例，供读者参考篇1My Hometown ChangesMy hometown has changed a lot over the past few years. Five years ago, it was a small and quiet village with only a few shops and houses. But now, it has transformed into a bustling town with new buildings, restaurants, and activities.One of the biggest changes is the increase in population. Many people have moved to my hometown for work and a better quality of life. This has led to the construction of new residential areas and shopping centers to accommodate the growing number of residents.The roads have also been widened and improved to handle the increased traffic. There are more cars on the streets now, and it can get quite congested during rush hours. However, the new infrastructure has made it easier for people to travel around the town.The development of my hometown has also brought new opportunities for businesses. There are now more jobopportunities available, and many people have started their own businesses to cater to the needs of the growing population. This has helped boost the local economy and create a vibrant community.Despite all these changes, my hometown has managed to retain its charm and character. The old buildings and landmarks are still standing, reminding us of the town's rich history. I am proud to call this place my home and excited to see what the future holds for my rapidly changing hometown.篇2My Hometown ChangesMy hometown has undergone some significant changes over the past few years. Five years ago, it was a quiet town with just a few small shops and restaurants. However, today it has transformed into a bustling city with tall buildings, large shopping malls, and modern infrastructure.One of the biggest changes that have taken place is the development of new residential areas. Five years ago, there were only a few housing estates in my hometown. But now, there are numerous high-rise apartment buildings and gated communitiespopping up all over the place. This has led to a significant increase in population and traffic congestion in the area.Another noticeable change is the improvement in transportation. The local government has upgraded the road network, built new bus stations, and introduced a subway system. This has made it easier for people to commute to work and travel within the city.In addition to this, my hometown now has a variety of new entertainment options. There are several new cinemas, parks, and shopping centers that have opened in recent years. This has made it easier for residents to relax and enjoy their leisure time.Overall, the changes in my hometown have been positive and have greatly improved the quality of life for its residents. I am proud to see how much my hometown has grown and developed over the past few years. I am excited to see what the future holds for this vibrant city.篇3The Changes in My HometownMy hometown has changed a lot in the past five years. The most noticeable difference is the improved infrastructure. Roads have been widened, new bridges have been built, and publictransportation has been upgraded. This has made it much easier to travel around the town.Another change is the increase in the number of shopping malls and entertainment venues. There are now more options for shopping, dining, and leisure activities. This has brought more convenience and entertainment options to the residents.In addition, there has been a significant improvement in the quality of education and healthcare services. New schools and hospitals have been built, and existing facilities have been upgraded. This has provided better opportunities for learning and access to healthcare for the people living in my hometown.Furthermore, there has been a focus on environmental conservation and green spaces. More parks and green areas have been created, and efforts have been made to reduce pollution and preserve the natural beauty of the town.Overall, the changes in my hometown over the past five years have made it a more modern, convenient, and livable place.I am proud to see how much progress has been made and look forward to even more improvements in the future.。
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Some significant population changes are associated with modernization. Population growth occurs as the death rate declines and life expectancy increases. Between the thirteen and seventeenth centuries, for example, Europe had a life expectancy as low as twenty years; by 1930, life expectancy had increased to over sixty years and now stands at seventy-three years. The population moves from rural to urban areas. Whereas most members of traditional societies work the land, most members of modern societies live and work in towns and cities, where industry and jobs are located.Class structures are altered by modernization. Traditional society is characterized by a bipolar class structure-the wealthy at one end, the poor masses at the other. Modernization brings an expansion of the middle and upper classes. As more emphasis is placed on personal effort and achievement, social mobility increases and inequality generally declines.The political institution is altered by modernization. The role of the state expands as it becomes more centralized and more involved in social and economic affairs. At the same time, modernization promotes political democracy, even though the extent of democratization varies considerably from society to society. Although political power is not equalized as a result of modernization, power is more widely distributed.Modernization transfers education from the family to a formal system of education. Education is no longer designed just for theprivileged few but for the entire society; primary education, in fact is intended for all members of a modernizing society. A literate population is absolutely necessary to create a workforce suitable for an industrialized economy.Modernization also affects family life. The nuclear family replaces the extended family. Because the economy ceases to be based on a familial division of labor, people must move to cities to work. Extended family ties become less necessary and much harder to maintain, and much of their intimacy can be lost. With modernization, functions formerly taken up by families are adopted by other institutions. For example, government assumes more responsibility for the elderly, schools take care of children’s educational needs, and the mass media provide entertainment. These social and cultural changes are usually associated with modernization. Does this mean that all of tem will occur in every society that is undergoing modernization? Will they be expressed in the same specific ways in all societies? These questions have been debated by sociologists.1.As a society becomes more modernized, ______.A)people tent to live longer and urban population grows largerB)more people are working the land to increase the food supplyC)people are happier and enjoy more material comfortD)the gap between urban and rural areas enlarges2.It can be inferred from the passage that in a modern society ______.A)there is no longer inequalityB)there are only two classes---the wealthy at one end and the poor at theotherC)one has more chance to succeed than in a traditional society if heworks hardD)the government has less control over political affairs3.Which of the following statements is true about the changes broughtby modernization?A)One of the results brought by modernization is that everyone can go toschool.B)Modernization brought change in division of labor, which n turnresults in an altered pattern of family life.C)A typical modern family consists of grandparents, parents andchildren.D)People are less busy as the government has taken up most of theresponsibility in taking care of the young and the old.4.It is implied in the passage that_______.A)sociologists believe that every modernizing society will undergo thesame processB)there is no definite answer as to whether modernization will bring thesame changes to all the modernizing societiesC)different society will undergo different cultural and social changes inthe course of modernizationD)all the changes mentioned in the passage will occur in anymodernizing society5.in the passage, te author is mainly concerned with______.A)modernization and population changesB)social and cultural changes of modernizationC)modernization and changes in family lifeD)modernization and social development。