Pros And Cons Of Cell Phones In School - 1036 Words

In each school there are absurd rules; ours by far has the most. Ok I get it, the staff is trying to us learn with a cleaner environment, but they have to be able to understand that phones CAN help you learn! Phones give us opportunities to hold many useful things such as calculators, passwords, and our schedules. I can see that they would want to take it away because it is â€Å"distracting†, but I honestly think that it is more distracting not having it then actually having it, now all we can think about is checking our phones. Although much of the public debate is against it, there are pros associated with allowing cell phones in school. These advantages should not be ignored since cellphones in schools can actually add value to the†¦show more content†¦Parents can easily keep track of their children using cell phones, so in case something pops up during school hours, the child will just contact their parents. Mobile Learning: It is very important for students to be in a position to learn from anywhere at any time. The education world is changing and many scholars are attending virtual classrooms. Online education is now becoming more popular than before, mobile phones have also helped in the growth of M-Learning (mobile learning). Unlike a computer, cell phones are light and easy to carry. I believe that those are the most common but here are some other reasons: The slowness of the Computers. Without phones to listen to music on, kids need something to listen to music on. But, with this, it makes the computers run a whole lot slower. It takes almost double the time to get from one thing to another. Waiting for tabs to load can take out of class time that is needed. Keeping tabs. Every parent’s worst nightmare is not knowing where your child is. Many cell phone providers now offer a tracking option that will allow you to locate where your child is (or the nearest cell phone tower). This way if the school calls and says your child is absent, and you cannot reach them, you are able to track them down to make sure they are safe. Forget something? Whether it is their lunch, basketball shoes or homework, we all know that kids will be kids and that forgetfulness is a part of human nature.Show MoreRelatedPros and Cons of Cell Phones in Schools626 Words   |  3 Pages of their calls on a wireless phone. The increase in cell phone usage has expanded into our children’s schools. Many children in today’s society carry a cell phone on their person to school. This increase of usage and change of demographic has created a debate in many schools. Read more: Pros Cons of Cell Phones in Schools | eHow.com http://www.ehow.com/about_5393195_pros-cons-cell-phones-schools.html#ixzz29NbPSPub School Emergencies The increase of school shootings and threats has encouragedRead MoreCell Phones for Young People Useful or Distracting?1031 Words   |  5 Pages There has always been controversy as to whether texting and cell phone use can cause young people to be less likely to be able to concentrate and focus. As young citizens we have the right to be able to own a cell phone and not be criticized using it for educational reasons. Phones give you access to the internet, teach responsibility, and is an emergency access to contact parents; however it can cause cheating in class room areas by sharing answers, it can distract people from doing work in classRead MorePros And Cons Of Teenage Cell Phone Use1023 Words   |  5 PagesDecember 2014 Pros and Cons of Teenage Cell Phone Use Cell phones have become a major part of people’s lives. They are probably one of the biggest inventions when it comes to communication because of the many functions that they are capable of performing. The use of cell phones has become especially popular among teens as it is a major part of teenage social life. One source states that â€Å"22 percent of children ages 6 to 9 own a cell phone; 60 percent of tweens ages 10 to 14 own a phone, and 84 percentRead MoreEssay on Cell Phone Use in Schools Should Not be Banned1401 Words   |  6 Pagesstudents be able to use cell phones during class periods? This is a question a lot of students and parents have asked themselves. The invention of cell phones started a debate for many schools. Many schools accept the use of cell phones but experience a lot of frustration over them. There are many reasons for and against the use of cell phones in schools. People who support cell phone use in schools are usually teenagers. People wh o disagree with cell phone use in schools are usually teachersRead MoreCell Phones And Their Possession At School Essay1593 Words   |  7 PagesCell phones in schools Researchers show in today’s society that there is a higher rate of students having cell phones at school than in prior years. There are many pros and cons to children having cell phones in their possession at school. According to Maya Cohen, a 2010 Pew Research Center found that 65 percent of cell owning teens bring their phones to school despite any bans that may be in place. It is up to the child to know the rules and regulations when carrying a phone at school, and it isRead MoreThe Impcats of Mobile Phones on Young Generations884 Words   |  4 Pagesinfluence of mobile phone in general and specifically on youth, its positive and negative aspects in terms of social life, safety, health and studying alongside with real evidences obtained from recent research. The idea of communicating using mobile phone was first introduced in 1947 by Bell Laboratories (Merlin Thanga Joy, 2010), and it was initially made to accompany businessman and not to support personal life (Campbell, 2005). However, according to (Aoki and Downes, 2003), mobile phone has graduallyRead MoreShould Students Use Cell Phones? School?1310 Words   |  6 PagesLook around you; have you seen someone without a cell phone? These days cell phones have more features other than texting or calling. They now have touch screens and cool tools. Some phones, such as the iPhone, can tell you the weather, stock prices, where you are at, and it is even voice activated! Today s cell phone is cutting-edge technology at your fingertips. With this being said, should students be allowed to have or use cell phones in school? I think that not only students should be allowedRead MoreCell Phones Should Be Allowed in School802 Words   |  4 Pagesabout one another. You discover that you do not have a cell phone or any device to contact your parents. There won’t be any chance that you and your parents could contact each other. What would you do? How would you feel? It seems to me that if cell phones were allowed in schools, students could contact their parents easier and people could stay in touch. Therefore, cell phones should be allowed to be used in schools. For one, cell phones could provide students with academic help. According toRead MoreCell Phones Should Not Be Banned910 Words   |  4 PagesCell Phones Should be Allowed in School Seventy eight percent of 12-17 years old have cell phones as of a survey taken in 2013. Cell phones have boomed and its time to let them shine. Cell phones becoming a major part of peoples life’s. Cell phones are welcomed every where this days. There allowed in restaurants and hospitals, but one place they are not welcome are schools. Cell phones should allowed in schools. Cell phones are used by around third of the population. With teenagers being a very bigRead MoreRadio Frequency Identification For The Cosmetics Industry1463 Words   |  6 PagesLuftwaffe. (RFID 2005). This paper is a very brief review of literature about RFID and its pros and cons with respect to the cosmetics industry. Methodology I input the search term RFID into a journal database and got thousands of hits—that s too many to be useful, so I added a limiter: RFID cosmetics. This came back with only a handful, which I m using in this paper. I also input RFID pros cons and got a few more, which I ll also include. The obvious conclusion is that the cosmetics

What was the environment in which you were raised - Free Essay Example

Sample details Pages: 2 Words: 494 Downloads: 1 Date added: 2018/12/18 Category Engineering Essay Type Admission Essay Level High school Did you like this example? Varanasi, a small town in India forms my background where I have been raised and lived together with my family members. Being the first born, life has not been easy following the economic status of parents where my father was only the breadwinner in the family and only worked as a local electrician with the salary of USD 6,500/per year. However, my parents did all their best to ensure we lived better despite the little earnings to support all the family needs. During my childhood, I remained very close to my father which greatly exposed to technology and I developed interests to learn more about. I remember how I engaged my father in the evening to ask about some gadgets and how they can be made since I wanted to learn much about it. However, my parents wanted me to get the education first which they thought was the best rather than focusing on technology which was my curiosity to learn. With the effort of my parents, I got a school around our home area which was a bit expens ive and most of the times I would spend at home due to fees debts. Being the only child who had joined a school in my neighborhood, everyone hated me and they actually celebrated when I was sent home for fees. However, this did not change my life and focus despite most of my friends abandoning me after their parents instructed them to isolate from me in whatever we do. Naturally, I love learning new things which will involve exploring and practical rather than getting what has already been prepared in books and theories. This trait led me to develop a conflict with teachers as I always complained we needed to do much of practical than the notes given in the class. With time I realized this was influence from my father whom I used to watch while doing his electrical jobs at home. Mostly, I preferred leaving the school earlier to watch and interact with my father while using his tools since I was curious to learn the electrical work and the related appliances. On observing my ag gressiveness, my father bought me a computer which I used to practice coding and learning about some new technology in it. My parents did not support me doing these coding with my computer and they encouraged me to focus on my studies little didnt they know computer and technology are sources of my prosperity. Further to this, after getting android which I got from my parents, I became IT expert by developing various applications in the phone which found me being nominated for a programming website competition in our school while in the eleventh standard. Due to my success in this competition both teachers and my parents started believing in me and appreciating what I did. For my neighborhood who heard about my success on the website, a competition was not happy and continued to hate me. Don’t waste time! Our writers will create an original "What was the environment in which you were raised?" essay for you Create order

Violent Conflict And Thechallenge Of Food Security Essay

VIOLENT CONFLICT AND THECHALLENGE OF FOOD SECURITY IN NORTH EAST NIGERIA BY MOTUBOMA THOMAS Department of Political Administrative Studies (International Relations) University of Port Harcourt, Port Harcourt, Nigeria ABSTRACT This research work sought to examine the effect of violent conflict and the challenge of food security in the North Eastern region of Nigeria as well as its effects on other part of the country and neighbouring countries. Emphasis was placed on analysing the relationship between violence and agricultural productivity and investments in the region using contextual analysis based on both primary and secondary data. The theoretical perspective that was adopted is the frustration aggression theory which states that people will always resort to violence/aggression whenever they are excessively frustrated. This theory was therefore employed to understand causes of the problem of violent conflict in the North East. It was established that violent conflict has caused a lot of problems for the people living in that region most especially with regards tofood security since most of the inhabitants of this region are subsistence farmers and since they have been displaced, cannot cultivate their farms to feed themselves. The study recommends that government should tackle the root cause of violent conflict and strengthen the fight against insurgency in order to bring lasting peace to the region. The study also suggested that the economy should be highly

Tama Speed Cobra Pedals Review Free Essays

Camco, DW and Ludwig have all produced such beasts, as has Japanese drum giant Tama. Its Iron Cobra pedal is truly a drum world icon, having been relied on by countless big-name artists on the world’s biggest stages over many years. But now comes a new pretender in the form of the Speed Cobra, with features borrowed from its well-regarded older sibling and a host of innovative design tweaks to boot. We will write a custom essay sample on Tama Speed Cobra Pedals Review or any similar topic only for you Order Now Tama’s tagline for the Speed Cobra is ‘Extreme Velocity, Serious Power’. As such the Speed Cobra’s new features have two simple goals in common – to increase speed and to increase aggressive response. Tama points out that these two aims have traditionally been mutually exclusive, with fast pedals losing some power, and powerful models reacting slower than some would like. So what solutions do Tama offer? Well to start with, a quick overview of the features which the Speed Cobra shares with the Iron Cobra. Such things include the Oiles bearing hinge (as used in the aerospace industry no less), the patented Cobra Coil spring – which is located beneath the footboard to quickly return it to its default position after each stroke – and the Vari-Pitch beater holder that enables adjustment of the footboard link angle independently of the beater angle. To that already impressive mix, the Japanese company has added several significant new features. The first and most obvious of these is the ‘Fast Foot’ footboard. Longer than on the Iron Cobra, the Fast Foot board is designed to increase speed of response but at the same time require less effort than previous designs. In addition, the face of the board is smooth to reduce friction, which Tama reckon will improve control. On top of this there’s an impressive new bearing assembly in the shape of the Fastball bearing on the end of the drive shaft, a true round sprocket (which Tama have named, brilliantly, ‘LiteSprocket’) that’s evidently 40 percent lighter than the Iron Cobra’s, and the new Projector Beater. The beater allows the choice of narrow or wide ‘striking surfaces’ simply by changing the head angle – go for punchy, defined attack with the former or a fatter, fuller response with the latter. All this talk of new features (and we haven’t touched on the chain drive’s new Recessed Setting which increases the angle of attack for super speed and light action, nor the new ‘Super Spring’, designed to offer less resistance at the beginning of the pedal stroke) has left us little space to discuss the actual build quality of the Speed Cobra. Fortunately, little space is required for this, as it is stunningly good. The Speed Cobra is beautifully engineered and does the Cobra name proud. If your eyebrows headed skyward at the number of clever feature names Tama has bestowed on the Speed Cobra, a word of warning. For sure, it’s easy to dismiss ‘Speed Spring’ or ‘LiteSprocket’ as marketing waffle, but when pressed into action the Speed Cobra does a fantastic job of silencing the cynical. For starters it’s an incredibly smooth-rolling pedal. An objective appraisal of the impact of the new bearing mechanisms, for example, is well out of the scope of a review like this, but subjectively it feels wonderful. .For metal drummers dishing out high-bpm double bass battery, the Speed Cobra could be your new best friend. But that’s not to say Tama’s newbie is a one-trick pony. It’s so well-conceived and built – with the kind of near-endless adjustment that high-end pedals offer these days – that it could be pressed into service in any genre with aplomb. How to cite Tama Speed Cobra Pedals Review, Papers

Supporting Change within Organisations HR Manager

Question: Discuss about theSupporting Change within OrganisationsforHR Manager. Answer: Introduction Each and every organization needs to adopt the change in order to sustain in this competitive world. On the other hand, the role of HR manager is one of the critical factors that influences the impact of change on the organization. Besides that, Dubai Financial Market is one of the most reliable supermarket chains of the UAE. Various types of factors and approaches which involved to manage change will be discussed in this report. Also, the impact of change on the employees and the stakeholders will also be explained in this paper through proper arguments and justification. Moreover, how the management of Dubai Financial Market manages change by implementing innovative idea and techniques that also be focused on this assessment. Apart from that, this report is based on the change management that will enhance the performance of Dubai Financial Market by improving the Human Resource Management. Also, the selection and recruitment system are the significant elements which influences a su ccessful change process. Internal and External Factors for Change Management Today, business is moving fast, and change is needed to develop the business in a proper way. Change is needed in Dubai Financial Market to meet the new demands of the customers. Based on technology, a change that results from the adjustment of new technology is standard in most organizations. Change can lead to the development of economic and financial situation of the company. A strong economy of the company states that the organization will be engaged in recruiting new skilled staffs and employees (Alexeev, 2014). Moreover, a change also leads to competitive advantage. A change management has internal and external forces which are described below: External Factors Competition- change is needed in the competitive landscape like mergers and acquisition, offering of new products, bankruptcies and so on. These changes impact the operation and strategy of Dubai Financial Market (Call for Papers: Journal of Change Management, 2015). Technology- The technological changes are a constant threat and it embraces new technologies ahead of the competition needs flexibility. If Dubai Financial Market can implement a unique technology, then they can achieve future objectives. Internal Factors Change in Management- A management change includes new CEO which impact on corporate strategy and culture. The management change also includes identification of risk associated with the business (Change management, 2007). Restructuring the organization- Organizational restructuring is an internal factor for change management. The development of new strategy or modifying the existing one helps to grow the business. Besides, training is needed during change management. Impact of Change Management on the Organization A modification of an organization affects the company positively or negatively. Change can lead to the employee turnover. Some of the employees of Dubai Financial Market may not like the change and wants to leave the company. At that time, new employees are hired. If the change is technological change, the hiring of new skilled employees benefits the company. After the change, the company can respond faster to the demands of the customer (Fernndez-Prez, Fuentes-Fuentes and Bojica, 2012). It also helps to align the existing resources within the enterprise. Besides that, an effective change in a particular business reduces the risk connected with the firm. It also helps in managing the cost of change. Three ways by which change management impact on the organization: Communication- New channels of communication are opened after a change management. After the modification, Dubai Financial Market should improve the communication process or modify them so that they can deal with the customer appropriately. Coping with change- Both the organizations and the employees need to address the modification. The effectiveness and efficiency of Dubai Financial Market are maintained by acknowledging the concerns of employees (Newton, 2010). The coping process increases trust and confidence among the workers of Dubai Financial Market. Capturing learning After the change, the existing members of the company needs to capture fast the new rules and regulation of the enterprise. The rapid learning technique made an average employee and experienced one (Greener and Hughes, 2006). More knowledge will lead to an increase of more experience level. Role of Approaches with a Process of the Change Management There are various types of approaches are engaged in the process of change management implementation. One of the major approaches is selection process of efficient HR manager, active communication system, and employee retention. Each and every factor are related to employee performance, organization structure and culture. In other sense, the recruitment process that is in use within the organization and influenced by three major approaches such as communicate with candidate deeply, analyse the knowledge of candidate and determining decision-making sense in the difficult situation. On the other hand, the management of Dubai Financial Market needs to focus on the Human Resource department and appoint efficient HR managers who eligible to recruit appropriate employees for the organization. In other sense, the HR managers should strictly conduct the interview process and analyze the ability of the candidates(Newton, 2010). First of all, HR managers should provide the laptop to display in dividual projects of the candidates. Besides that, with the help of the internet, the HR managers can identify and justify the personal details of the candidates through accessing various resources. In other words, the management should provide effective training to each and employees who get selected by the HRM of Dubai Financial Market. BehavioralResponse of Change inside the Organization After a change takes place in an organization, a change in the behavior of the employees are observed. Some of the employees fear the unknown, and they get worried about the change. As a result, there is three behavioral response in the organization to those who are interested in participating in the change management. They enroll themselves in the modification. They get training on adapting the new situation of the company. The individuals devote their energy and time to the particular moment. The individuals accept and face the challenges which arise during a change procedure. Besides that many employees could not properly adopt changes which recently occur in the organization. As a result, the managers has to pay additional time to rearrange the activities of the employees. In addition, the behaviour of employees become violent when the authority declares the notice of required training for change management(Fernndez-Prez, Fuentes-Fuentes and Bojica, 2012). Moreover, the response of HR manager will become mature and he/she helps the employees to adopt change in the organization. On the other hand, efficient and intelligent employees started to behave more obediently with the management for promotion through employee performance. Role of Human Resource Management to Support the Change Management There is a significant role of Human Resource Management in the organization. With the help of some ways, the HR can support the change management. The management is an organ which is used in multipurpose. It manages the HR manager; it administers the employee, and it also controls the organization. So to run the organization in a right way, the HR manager needs to support the every employee in the organization. In other words, HR manager should recruit such employees who are eligible for that process. They should have different abilities about different works. As if when any changes will come in the organization; they can solve this by applying their intelligence. On the other hand, the HR manager has to be professionally friendly to improve their contribution to work. He or she also has to make a favorable environment by implementing some technology. The HR has to improve the training process through providing proper technology about the organization and has to make a good workplac e. The HR should give the feedback to the employee and receive the feedback from the employee. For that, the employee will be updated about the current position of the organization and can easily handle any problem correctly and meet the challenges. Besides that, the HR has to help all the employees about their job. HR has to understand their requirement and motivate them in the job by fulfilling this at the time. Then they will be more motivated to accomplish their job(Bojica, 2012). The development of the organization depends on the proper management and HR needs to manage every employee in a perfect way. By all together, the HR manager plays a unique role to influence the support of individuals during the change. Conclusion This paper clearly notifies the significance of change management which seriously improve the organizational performance. The management of the Dubai Financial Market needs to focus on their old employees and training process. Besides that, the management should recruit more efficient trainer who able to provide effective training to all newly appointed employees. In addition, the HR manager should observe the activity of trainer and report to the higher authority of the Dubai Financial Market. Moreover, in order to implement a successful change management, Dubai Financial Market needs to rectify above mentioned internal and external factors which critically influence the change. References Alexeev, D. (2014). Russian Politics in Times of Change: Internal and External Factors of Transformation.Connections: The Quarterly Journal, 14(1), pp.105-120. Call for Papers: Journal of Change Management. (2015).Journal of Change Management, 15(3), pp.253-255. Change management. (2007). 1st ed. Oxford: Pergamon Flexible Learning. Fernndez-Prez, V., Fuentes-Fuentes, M. and Bojica, A. (2012). Strategic flexibility and change: The impact of social networks.Journal of Management Organization, 18(01), pp.2-15. Greener, T. and Hughes, M. (2006). Managing change before change management.Strategic Change, 15(4), pp.205-212. Newton, R. (2010).Change management. 1st ed. Harlow: Financial Times Prentice Hall.

Space Essay Research Paper Evolution a process free essay sample

Space Essay, Research Paper Development, a procedure of alteration through clip, is what links together the tremendous diverseness of the life universe. A batch of grounds is present that indicates that the Earth has had a really long history and that all living things arose in the class of that history from earlier, more simpler signifiers. In other words, all species have descended from other species and all life things portion common ascendants in the yesteryear. Basically, beings are what they are because of their history. Today there are many theories and possibilities related to development which contribute to our apprehension of the procedure. Our planet was born 4.6 billion old ages ago as a great cloud of dust and gas condensed into a sphere. As gravitation pulled this great cloud tightly together, heat from great force per unit area and radiation melted the planet? s inside and most of its mass. We will write a custom essay sample on Space Essay Research Paper Evolution a process or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page For 1000000s of old ages after this, strong volcanic activity all over the planet shook the Earth? s crust. At the same clip, the Earth was showered by a really strong meteor shower. From analyzing vents, it is known that eruptions pour out C dioxide, N, and other gases. It is besides known that meteorites carry H2O, in the signifier of ice, and many C incorporating compounds. That might propose that the combination of volcanic activity and a changeless shower of meteorites released the gases that created the Earth? s atmosphere. Geologists believe that the Earth? s early ambiance contained H2O vapour, C monoxide, C dioxide, H, and N. It besides may hold contained ammonium hydroxide and methane. It did non incorporate O, which is the chief ground why the Earth could non hold supported life. As for oceans, they couldn? Ts have existed at foremost because the Earth? s surface was highly hot. But about 3.8 billion old ages ago, the Earth? s surface cooled plenty for H2O to stay a liqui d on the land. Thunderstorms wet the planet for many old ages and oceans began to make full. This is known because the earliest sedimentary stones have been dated to that clip period. Miller and Urey were two scientists who attempted to explicate the beginning of life on Earth without mentioning to any supernatural events. They performed an experiment that suggests how the Earth? s atmosphere might hold formed. Miller assorted # 8220 ; atmospheric # 8221 ; gases ( H, methane, ammonium hydroxide, and H2O vapour ) in a unfertile glass container and charged them with energy by adding electric flickers to them. The electric flickers resembled lightning at the clip of the Earth? s formation. After about a hebdomad, the mixture turned brown and was found to incorporate aminic acids. This organic compound produced in this experiment was efficient in cognizing how the Earth? s early atmosphere formed. That is because it was successful in bring forthing some of the edifice blocks of nuclei c acids under geologically relevant conditions. A inquiry that puzzled scientists was how could all this have started in the first topographic point. It is noted that aminic acids and nucleic acids stick to the constructions of clay crystals. By being held together in a regular form on clay crystals, these molecules combine to organize proteins and polynucleotides. Other research workers non that some sorts of RNA can fall in aminic acids into protein ironss without aid from protein enzymes. Some signifiers of RNA can copy themselves and can really redact other RNAs by adding and canceling bases. These experiments support another hypothesis that RNA, instead than DNA, functioned as life? s first information storage system. Harmonizing to this hypothesis, life based on RNA have started when RNA fragments began to copy and redact themselves and assemble proteins. As clip passed, these RNAs could hold evolved to the point where they produced protein enzymes that took over the work of c onveying about chemical reactions. Subsequently, hive awaying familial information could hold likewise been passed on to DNA. In this manner, over 1000s of old ages, RNA, DNA, and proteins could hold evolved into the complex system that characterizes life today. Detecting that RNA can move as a accelerator, makes it easier to conceive of how life began. Harmonizing to Bruce M. Alberts, # 8220 ; One suspects that a important early event was the development of an RNA molecule that could catalyse its ain reproduction # 8221 ; . That makes it really obvious why it is possible that RNA was the first molecule that could retroflex. These molecules so diversified into a group of accelerators that could piece ribonucleotides in RNA synthesis or roll up lipid-like molecules to organize the first cell membranes. This clearly suggest how the first membranes could hold formed. Fox and his colleagues attempted to happen an reply, to the beginning of membranes and procaryotes, in their research labs. They heated amino acids without H2O and formed long protein ironss. As H2O was added and the mixture cooled down, little microspheres were formed. These seemed to roll up certain compounds inside them. They besides attracted lipoids and formed a lipid-protein bed around them, as mentioned above. Assuming that the microspheres combined with self-replicating molecules, we are looking at a really ancient being. This is what might hold happened 3.8 billion old ages ago as the first membranes and procaryotes were organizing. As for eucaryotic cells, harmonizing to Lynn Margulis? s hypothesis, they arose from what is called a symbiont relationship. Lynn Margulis believed that mitochondra were originally independent procaryotic aerophilic persons, populating on a symbiont relationship with another procaryote. The aerophilic procaryote was enclosed by the bacteria? s cell surface membrane in the procedure of endocytosis, which is made easy by the absence of a cell wall in the bacteria . The aerophilic procaryote wasn? T digested but continued to work inside the other cell. The host cell received energy that the aerophilic procaryote released. The chondriosome that was organizing had everything it wanted, taking it from its host. A similar procedure occurred subsequently with the host cell and photosynthetic procaryotes. This grounds explains the symbiotic theory for the beginning of the four Eukaryotic lands, which are the Protista, Fungi, Animalia, and Plantae. Jean Baptiste de Lamarck had his ain proposal of development. It was non truly accepted because his grounds, which was non really convincing, was non really back uping. Harmonizing to his belief, development is supposed to bring forth # 8220 ; higher # 8221 ; beings, with human existences at its ultimate end. Lamarck? s theory included heritage of acquired features, intending that an being? s life style could convey about alterations that it passed on to its progeny. An illustration would be the fact th at Lamarck believes Giraffes have long cervixs because their ascendants stretched their cervixs because their ascendants stretched their cervixs to shop on the foliages ; and that this addition in length was passed on to wining coevalss. This seemed unreasonable because people had been cutting off dress suits of many Canis familiariss but they neer resulted in an progeny born without a tail for that same ground. Therefore, Lamarck? s thought can non be right, chiefly because these alterations do non impact the familial stuff. Change happens in familial stuff merely when games are involved. In 1858, Charles Darwin introduced a theory of development that is accepted by about all scientists today. His theory provinces that all species evolved from a few common ascendants by natural choice. Another British scientist, Alfred Wallace, introduced an indistinguishable theory at about the same clip. But Darwin? s theory was better developed and more celebrated. Darwin? s and Wallace? s const ruct was based on five premises: 1 ) there is stableness in the procedure of reproduction 2 ) in most species, the figure of beings that grow, survive, and reproduce is little compared to the figure ab initio produced 3 ) in any population, there are fluctuations that are non produced by the environment and some are inheritable 4 ) which single tungsten ill grow and reproduce and which will not are determined to a significant degree by the interaction between these chance variations and the environment 5) given enough time, natural selection leads to the accumulation of changes that differentiate groups of organism from another. Darwin?s theory of natural selection is really the process of nature that results in the most fit organisms producing offspring. There has been experimental evidence for this process, attempting to prove it correct. Darwin observed that wild animals and plants showed variations just as domesticated animals and plants did. He filled his notebooks with records of height, weight, color, claw size, tail length, and other characteristics among members of the same species. He also observed that high birthrates and a shortage of life?s necessities forced organisms into a constant â€Å"struggle for existence,† both against the environment and against each other. Plant stems grow tall in search of sunlight, plant roots grow deep into the soil in search of water and nutrients. All that evidence is what supported Darwin?s theory about natural selection. Peppered moths provide an example of natural selection in action. Peppered moths spend most of their time resting on the bark of oak trees. In the beginning of the nineteenth century, the trunk of most peppered moths in England were light brown speckled with green. There were always a few dark-colored moths around, but light colored moths were the most common. Then, the Industrial Revolution began in England and pollution stained the tree trunks dark brown. At the same time, biologists noticed that dark-colored moths were appearing. The evolutionary hypothesis suggested that birds were the main reason. Birds are the major predators of moths. It is a lot harder for birds to see, catch, and eat moths that blend in with the color of the tree bark than it is for them to spot moths whose color makes a strong contrast with the tree trunks. The moths that blend in with their background are said to be camouflaged. As the tree trunks darkened, the dark-colored moths were better camouflaged and harder to spot, having a better condition for survival. This hypothesis was not enough, and more experiments had to be made. A British ecologist, called Kettlewell, prepared another test for this hypothesis. He placed equal numbers of light and dark colored moths in two types of areas. In one area, trees were normally colored. In the other area, they were blackened by soot. Later on, he recaptured, sorted, and counted all the moths he could, which were marked earlier by him. Kettlewell found that in unpolluted areas, more of his light-colored moths had survived. Kettlewell showed by his experiments that the moths that were better camouflaged had the higher survival rate. In conclusion, when the soot darkened the tree trunks in an area, natural selection caused the dark-colored moths to become more common. Kettlewell?s work is consider ed to be a very good classic demonstration of natural selection in action. All organisms share biochemical details. All organisms used DNA and RNA to carry information from one generation to another and to control growth and development. The DNA of all Eukaryotic organisms always has the same basic structure and replicates in the same way. The RNAs of various species might act a little differently, but all RNAs are similar in structure from one species to the next. ATP is an energy carrier that is also found in all living systems. Also many proteins, such as cytochrome c, are also shared by many organisms. This molecular evidence has made it possible to make precise comparisons of the biochemical similarities between organisms. Scientists also noticed that embryos of many different animals looked so similar that it was hard to tell them apart. Embryos are organisms at early stages of development. These similarities show that similar genes are present. The fact that early development of fish, birds, and humans is similar shows that these animals share a common ancestor, who had a particular gene sequence that controlled its early development. That sequence has been passed on to the species that descended from it. In the embryos of many animals the limbs that develop look very similar. But as the embryos mature, the limbs grow into arms, legs, flippers that differ greatly in form and function. These different forelimbs evolved in a series of evolutionary changes that altered the structure and appearance of the arm and leg bones of different animals. Each type of limb is adapted in a different way to help the organism survive in its environment. Structures like these, which meet different needs but develop from the same body parts, are called homologous structures. This is all additional evidence of descent from a common ancestor. There are other theories for the origin of species including special creation and panspermia. Special creation involves humans. Many p eople believe that humans were created by God; so the theories of evolution go against their religions especially why they do not see God?s hands in the process. As for panspermia, it suggests that life could have originated somewhere else and came to us from space. This might be possible but there is actually no supporting evidence for it. Paleontology has also played a big role in the study of evolution. Over the years, paleontologists have collected millions of fossils to make up the fossil record. The fossil record represents the preserved history of the Earth?s organisms. Paleontologists have assembled great evolutionary histories for many animal groups. An example would be looking at probable relationships between ancient animals whose evolutionary line gave rise to today?s modern horse. The fossil record also tells us that change followed change on Earth. Scientists can use radioactivity to determine the actual age of rocks. In rocks, radioactive elements decay into non-radio active elements at a very steady rate. Scientists measure this rate of radioactive decay in a unit called a half-life. A half-life is the length of time required for half the radioactive atoms in a sample to decay. Each radioactive elements has a different half-life. Carbon-14 is particularly useful because it can be used to date material that was once alive. Because carbon-14 is present in the atmosphere, livings things take it into their bodies while they?re alive. So the relative amount of carbon-14 in organic material can tell us how long ago this material stopped taking in new carbon into its system. That was the time it died. Then, a graph is used to determine the time. This is the way scientists can deduce the approximate age of materials based on a simple decay curve for a radioisotope. In organisms, variations in specific molecules can indicate phylogeny; and biochemical variations can be used as an evolutionary clock. Phylogeny is the line of evolutionary descent. Biochemi stry can be used to support other evidence about revolutionary relationships, and it can be very simple. Scientists study similar molecules in different species and determine how much difference there is between the molecules. The more difference there is, the longer the time-span since the two species shared a common ancestor. The most commonly used substances in this technique are hemoglobin , cytochrome c, and nucleic acids. Hemoglobin is suited to studying closer related organisms that contain hemoglobin. Cytochrome c has been used to compare groups that are more different. The results from comparative biochemistry lone do not prove anything, but they confirm data found using other methods. Together, they become convincing. Today, the theory of evolution is generally considered to be the most important fundamental concept in the biological sciences. Nearly all scientists support it. However, large numbers of people opposed the theory when it was introduces. Still, some people do not accept it today.

The Andromeda Strain essays

The Andromeda Strain essays The Andromeda Strain takes place in the 1960s in the United States, primarily in the southwest region of the continent. The military is launching a series of satellites for a project called SCOOP. The satellites were sent out to enter the Earths orbit and collect microorganisms for study. The final satellite in the SCOOP series landed in a small town in Arizona called Piedmont. Once the capsule was discovered by a local inhabitant, the population instantly dropped from forty-eight down to two. The satellite recovery team loses contact with the base, and then the military sends out specially equipped aircraft to survey the town. The films taken by the aircraft reveal dead bodies sprawled out all over the streets of the town. In fear that a biological crisis has occurred, the military calls on its specially trained team called Wildfire. The Wildfire team was sent to Piedmont to investigate, and they found two survivors left in the town. One of the survivors was an anemic man, a nd the other was a wailing infant. The team then collects the capsule (or the downed SCOOP satellite) and travels to a secret laboratory in Nevada to study the evidence and devise a solution. The duration of the story consists of the team going through certain procedures in order to discover all that they can about this new organism. Microscopic analysis of the satellite reveals that a small black meteor covered with small green specks is embedded in the outer wall of the satellite. The green specks are observed to expand on the surface of the rock. Mass spectrometry performed on the rock and the green specks show that both the rock and the green specks are organic, consisting mainly of carbon, hydrogen and oxygen. Amino acid analyses reveal that no amino acids known on Earth, and therefore no proteins, exist within the structure of the microorganism. This concept is explained perfectly, and told by a ...