Monday, July 27, 2020
Asian American, Gifted Example
Asian American, Gifted Example Asian American, Gifted â" Article Example > Asian American, GiftedIntroductionGifted children are endowed with abilities that are not normally found in children of their age group. Some of these abilities come as a special development of faculties far in advance of their ages. In certain cases gifted children also tend to suffer from Autism, or Dyslexia and other form of imbalance. They may thus have special skills in one area which is overshadowed by lack of development in another. Gifted children have special requirements in education, training and care. In the case of Asians who are now American citizens, the needs of the gifted children are complex as compared to the needs of native born American children. The issue is complex because Asian culture, language and communication are vastly different and even though the family is oriented well enough to adjust to the US environment, normal interactions in the case of gifted children from these countries differ. The method of identifying such children have to be revised and a unique method of assessing their potential closely linked to the culture and way of responding has to be evolved. Many factors, such as language, specific religious faith, cultural taboos and parental confusion will add to the problem of first identifying gifted children and then tailoring a program to suit them. The second objective would be to evolve a system that coaches and trains parents to help the children cope with the demands of the child and the education proposed to be given. This is a situation which requires multiple entity participation like the parents, the teachers and education experts who will eventually deal with the child, and the environment creators and facilitators who will support the programs intended for the children. While Native American children can cope with the available system, as they are born into it or otherwise accustomed to the information delivery system, their parents and educators are comfortable with dealing with them. In their case it is just advancing the child through a series of steps before time, like promoting to the next grade, skipping two semesters etc. In the case of Asian children, this can have negative ramifications because skipping a semester and advancing the child to another set of classes which he is suited for has an uprooting feeling. Feelings and EmotionsOne important thing to remember is that gifted children also have simple needs that have to be met just like other children of their age. Except for the fact that they are able to assimilate and transform information faster the biological social and psychological needs of these children are the same as those of their contemporaries not endowed with special skills. This is often overlooked. In the case of Asian children the needs vary largely from other communities. Asian children follow a typical lifestyle inherited from the community in their original homeland. Some requirements of their culture and psychological factors learned or given to th em by the system they inherit from their parents may be at tangent to the prevalent atmosphere they find themselves in, especially if they are treated as âspecialâ.
Friday, May 22, 2020
Ways of Computing the Value of Alternative Projects Essay...
Ways of Computing the Value of Alternative Projects When deciding whether to invest in a project an investor first will compare investment or sunk costs to the expected profit and based on this decision will decide what to do. Depending on the specifics of the project calculating of sunk cost and expected profit might be rather different and will play the main role in the decision to invest, wait and invest later or not to invest at all. More detailed consideration of the standard NPV rule: to invest if present value of cash flow is greater than sunk cost will show that some projects cannot be simply estimated using this idea. For the irreversible projects such as building a factory or buying an option NPV method may not be properâ⬠¦show more contentâ⬠¦Now, consider the factory that can produce some product. There is F=100 the sunk cost of building the factory and the price of the product is P=$10 today. In a year there are two possible options: the price will go up to $15 with probability 1/2 or will go down to $5 with probab ility 1/2 and then stay at these levels. Let us calculate net present value of the project if invested today (expected price will be $10, because 1/2à ·15+1/2à ·5=10 and the interest r=0.1 for easy calculations): NPV=-100+Ãâ0[10/(1+r)t]=$10 notice that in this case we have summation from 0 to infinity because the process starts on the step one, it means we invest in project right now. Using our parameters we can see that NPV if invested today is equal $10. Now let us calculate net present value, but in this case we do not invest right now, but wait and invest only if the new price is 15, which happens with probability 1/2: NPV=0.5[-100/(1+r)+ Ãâ1[10/(1+r)t]]=$30 we have to discount the value of the sunk cost and also sum not from zero as in the first case but from 1, since we wait for a year. Thus, we can see that NPV if we wait is bigger by $20, this value is the value of flexibility or option to wait. The same thing can be computed for three-step process and more. Now we can see the difference in the calculations and gain if we wait. This gives an investor new option - to wait and gather information, so his expected profit will be higher. Of course, theShow MoreRelatedEssay On ECS1383 Words à |à 6 PagesOCA is best positioned and qualified to stand up ECS: Cloud computing overview Cloud computing is a model for enabling ubiquitous, convenient, on-demand network access to a shared pool of configurable computer resources (e.g., networks, servers, storage, applications and services) tha can be rapidly provisioned and released with minimal management effort or service provider interaction. Five essential characteristics of cloud computing: on-demand self-service, broad network access, resource poolingRead MoreWhat Is Dynamic Nature Of MIS Infrastructure1241 Words à |à 5 Pagessavings, to replace legacy systems which lack the connectivity and intelligence for business efficiency improvement. EG Inc. is using agile methodology and Scrum for structured software project management. Compared to the traditional waterfall methodology, agile methodology offers a simpler framework for project management focusing on constant evolution and rapid delivery. It is flexible with the design process broken into separate blocks to be assigned to teams, which have freedom to in corporateRead MoreImpact Of Technologies On The Economics Of Healthcare1195 Words à |à 5 Pageshealth providers and the entire health care industry value chain. 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As the industry growsRead MoreThe Value Of A Trust Value1702 Words à |à 7 Pagesevidence) is less useful that knowing that the trust value contains the success rate of the driving exam questions also found in the motorcycle exam. A trust value may include these pieces of evidence to facilitate mapping but this may violate privacy (see the latter example). At the other extreme, a trust value may only consist of the pieces of evidence without the trust calculation result, because the trust value calculation can reveal more than the value (e.g., how trust is calculated). Another reasonRead MoreCloud Based Information And Communication Technology Has Helped Small And Medium Enterprises ( Smes )1427 Words à |à 6 Pagescompetitive in the global market by using Cloud technologies to develop and sell their products and services. Agriculture industry is one example of industry that will benefit from this computer-to-computer communication, and produce long-term economic value for mid class farmers. In conclusion, for those internationally orientated SMEs who aspire to be at the cutting edge of technology, and for those SMEs who want to fully derive benefits from business opportunities across national borders no matter inRead MoreDesigning A Data Centre Topology Architecture1648 Words à |à 7 Pagesarchitecture. â⬠¢ Resilience ââ¬â should be designed for high availability of the distributed cloud services that it carries and with ââ¬Å"zero-downtimeâ⬠. â⬠¢ Automation ââ¬â should support SDN for automated per minute consumption of capacity and automated failover to alternative paths. â⬠¢ Scalability ââ¬â support future growth without the need to redesign ââ¬â ie by adding additional nodes with a simple building block approach 9.1.2. IP and Optical Networks implementation architecture options Simplification of our IP networks
Saturday, May 9, 2020
What Foucault Calls `` Bio Power `` Essay - 1546 Words
What Foucault calls ââ¬Å"Bio-powerâ⬠, an institutional power of the life and death of the human species, a long-term result of the 17th century Cartesian mechanization of nature, could be considered dangerous. The question today is: is having power of manipulation, life, and death dangerous? Should someone have the power to be able to give, extend, or end a life? Is it overall helping or harming humanity? The subject of bio power, or the idea of someone having the power to control another, has been around since the stone age. The ability to ââ¬Å"controlâ⬠or manipulate someone has always been a possibility. In the stone age, the more strong, wise, and powerful caveman controlled the younger, weaker caveman. Today, our bosses, coaches, and professors have the ability to ââ¬Å"controlâ⬠us. It all seems to relate back to social anarchy, and who is on top of the ââ¬Å"popularity ladderâ⬠. The word or expression ââ¬Å"Bio powerâ⬠, however was coined by Michel Foucault, a French scholar, historian, and social theorist in the late 1960ââ¬â¢s. Foucault was interested in the regime of power he saw rising, which he termed ââ¬Å"bio-powerâ⬠or the power that governments and institutions exercised over man. Foucault took interest in the objectification of a human subject, and how knowledge became power, specifically the idea of how it could be used for the wro ng reasons. For example, how scientists and doctors have to the power of life and death in the palm of their hands. To fertilize, or sterilize a human being, toShow MoreRelatedState Of Exception As A Paradigm Of Government862 Words à |à 4 Pagespolitical crises appear only to be understood on political and not juridical grounds. What is little recognized is that law possesses within itself an exception that traps humans and objects within the juridical order. The state of exception increasingly appears to be dominant in contemporary politics. As an example : The USA Patriot Act (issued on October 26, 2001), which gives the United States government the power ââ¬Å"to take in custody any alien suspected of activities that endangered the nationalRead MoreOrganizational Theory And Understanding Of Modern Management Practices1929 Words à |à 8 Pagesinstitutional building designed to make the people surveilled unable to know when they were observed. Years later, as forms of power c hanged and transformed throughout time, the Panopticon becomes the perfect analogy for Michel Foucault to explain the advent of a new form of dominance: Disciplinary power. This form of power, strictly related to Foucaultââ¬â¢s theory of bio-power, will later become key in the development of organizational theory and understanding of modern management practices. ThroughoutRead MoreMichel Foucault: Power and Identity Essay1990 Words à |à 8 PagesIntroduction Michel Foucault and Erving Goffmanââ¬â¢s work was centralised around there two different concepts of how your identity is formed through the process of power and expert knowledge. This Essay will discuss the ideas of Michel Foucault who was a French Social Theorist. His theories addressed the relationship between power and knowledge and how both of these are used as a form of social control through society. The essay will look at Foucaultââ¬â¢s work in The Body and Sexuality, Madness and CivilisationRead MoreA Reflection On Public Administration Essay5906 Words à |à 24 PagesPosttraditional Public Administration Since the linguistic turn, sparked in the late 1960s by such theorists as Jacques Lacan and Michel Foucault, interesting normative and methodological challenges for the policy sciences have emerged. A posttraditional society is often characterized as an individualized society because individuals are increasingly required to construct their own lives. To begin, a posttraditional society refers to both modernity and its reverberation postmodernity. ModernityRead MoreSocial Constructs And Its Effect On Society3459 Words à |à 14 Pagessoul wrenching because unique individuals feel the need to belong to a category that is ââ¬Å"pre-madeâ⬠by the society they live in despite their want and need to be accepted the way they are. One has seen monarch rule over land and gain immense amount of power through violating the rights of those considered ââ¬Å"unimportantâ⬠. Social constructs which seem to pursue the same framework, where one party benefits from the failure of anothe r. In the situation where the monarch leads, he is a set person that everyoneRead MoreThe Scientific Study Of Personhood1419 Words à |à 6 Pageshumanity (Harris 1968; 1). The anthropological study of personhood deals with how varied cultures understand the concept of a human being in a given community and across the world. They try to address questions such as: ââ¬ËWhat defines a human being? Does a person have an inner self? What are these constituted in the perspective of the personal self?ââ¬â¢ and etc (Jurg and Joachim, 2013: 233). Durkheim (1964: 270) in his book the Elementary Forms of the Religious Life ââ¬Ëlocalizes the person somewhere betweenRead MoreThe Curriculum Policy Statement Of The Council On Social Work5929 Words à |à 24 Pagespatronizing as they assume that social workers work for rather than with people. Then what do these statements really signify? For nearly four decades, pundits have consistently proclaimed the bankruptcy of socialist ideas, the fascist evils lurking in communism, the triumph of the free market and liberal democracy... the so-called end of history (Fukuyama, 1992). Proposals to privatize Social Security, the cornerstone of what s left of the U.S. welfare state, have gained credibility and popularity, evenRead MoreManjula Padmanabhans Harvest: a Study2518 Words à |à 11 Pagesto the white angel smiling from the ââ¬Å"Contact Moduleâ⬠set up by the Inter Planta Services. She enjoys the pleasures of the European closet, the TV, and, finally, the ââ¬Å"fully automatic Video Paradiso Unitâ⬠(87) well equipped with ââ¬Å"a full-recycling and bio-feed-in processorâ⬠(88). This last mentioned becomes her electronic tomb within which she has no further need of the outside world. Om was earlier just wailing aloud to the Receivers to buy him; Jeetu had sold himself in instalments, and now exists Read MoreSex Education in Nigeria7622 Words à |à 31 PagesNigeria Lagos, Nigeria March 24, 2005 à © ARSRC 2005 -------------------------------------------------------------------------------- Page 2 2Introduction Ancient theories and ideologies about sexuality, circled around the power of dreams, the individual as a sexual being, the power of self cultivation and processes of essentialism. Although the concept of sexuality can be dated back to our ancestors, who laid much emphasis on the care of self and the act of procreation, emerging population and health
Wednesday, May 6, 2020
Legal opinion Free Essays
In the instant case, defendant Panah was convicted in the trial court of murder and he was sentenced to death. His case is now before us on appeal because of the rule on automatic appeal in case of verdicts of death penalty. In this case, an eight-year-old girl named Nicole Parker was visiting his father, Edward Parker in Woodland Hills. We will write a custom essay sample on Legal opinion or any similar topic only for you Order Now At 11:00 in the morning of the said date, Nicole asked her father for a softball and glove and went outside the apartment complex of his father to play. Forty-five minutes after, Edward looked for Nicole but she is nowhere to be found. Thus, Edward looked for his daughter within the apartment complex to no avail. Edward Parkerââ¬â¢s failure to find Nicole prompted him to call the police. Defendant Panah, the resident of apartment #122, talked to Edward and found out that the latter was looking for his missing daughter. When the police arrived, the defendant insisted that Edward come with him to Ventura Boulevard to look for Nicole, but Edward refused. Thereafter, one of the police was informed that Nicole was last seen talking to a man in his 20s who was living in apartment #122. Thus, the said policeman asked for the key to the said room from the manager and searched the apartment complex for Nicole but did not find her. Hours later, the detectives were informed that the defendant attempted to commit suicide and told a friend that he did something really bad that is in connection with the missing child. This friend told the police, which new information prompted the latter to conduct another warrantless search of apartment #122, wherein they found Nicoleââ¬â¢s dead body wrapped in a bed sheet and stuffed inside a suitcase. The defendant was charged with murder, and he raised issues as to the illegality of the warrantless searches in his pre-trial motions. However, the trial judge ruled that the warrantless searches were valid, and the defendant was convicted. In this appeal, the defendant again raises the same issues, arguing that the warrantless search conducted in his apartment unit was a violation of his rights under the Fourth Amendment, and that à à à à à à à there were no exigent circumstances warranting a warrantless search. Opinion: Under this jurisdiction, we uphold the right of citizens to be secure in their houses and effects. This security is embodied in the Fourth Amendment to our Constitution and is guaranteed by the rule that searches should be reasonable and supported by a warrant based on a finding of probable cause. The Fourth Amendment states: ââ¬Å"The right of the people to be secure in their persons, houses, papers and effects, against unreasonable searches and seizures shall not be violated, and no warrants shall issue, but on probable cause, supported by oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.ââ¬â¢Ã¢â¬ Thus, it is clear that as a general rule, a search warrant must be secured by police officers before barging in another manââ¬â¢s home and searching it for effects. However, this general rule admits of certain exceptions. Precedent: The case of McDonald v. United States, decided in 1948 (355 U.S. 451, 93 L. Ed 15), explained that emergency situations that serve as compelling reasons may justify the absence of a search warrant. While this case decided in favor of the defendant and emphasized his right to be secure in his house and effects, it provides authority for the other position, that is, that given reasonable justification, the requirement of a search warrant may be dispensed with. However, care must be taken so that it is certain that exigent circumstances do exist to justify a warrantless search. After all, it is a fundamental right of all persons to be secure in their houses and effects, and trivial suspicions and the lack of adequate justification should not be an exception to Fourth Amendment rights. à In Kirk v. Louisiana (536 U.S. 635), promulgated in 2002, the Supreme Court again ruled that the policeââ¬â¢s conduct of warrantless search was illegal, because they did not find exigent circumstances to justify the absence of a warrant. It should be noted that the court only struck down the validity of the search because there was no exigent circumstances to justify the warrantless search.à Nexus. These cases are authority to serve as the exact opposite of the case at bar. Here there is clearly an exigent and emergency situation. A child had gone missing, and the police did not know whether the girl was dead or alive. Time was of the essence, and the police had to make an immediate decision as to whether to conduct a search, if they were to save the life of the girl. Thus, in this situation, there is clearly an exigent circumstance justifying a warrantless search, because the life of a young girl is on the line. Moreover, probable cause exists, since even prior to the statement of the defendantââ¬â¢s friend regarding his confession, the police were able to gather information from other people that the victim was last seen talking to the defendant. Thus, since there was probable cause and exigent circumstances, this case clearly falls within the recognized exceptions to the Fourth Amendment, and the right of the defendant to be secure in his house and effects was not violated. Hence, the evidence derived from such warrantless search is admissible in evidence against him, and could form the basis of his conviction. The decision of the lower court is thus, affirmed. How to cite Legal opinion, Essay examples
Tuesday, April 28, 2020
Saint cecilia Essays - Ancient Roman Women, Saint Cecilia, Cecilia
Saint Cecilia is said to have heard heavenly music inside her heart when she was forced to marry the pagan, Valerian. A wealth of music, art and festivals in honor of St. Cecilia has grown from this little bit of information from her biography. She is the acclaimed patron saint of music, especially church music, as well as that of musicians, composers, instrument makers and poets. The name Cecilia means blind and so, although we don't know if she herself couldn't see, she is also the Catholic patron saint of the blind. It is believed that St. Cecilia was born in the 2nd or 3d century A.D., although the dates of her birth and martyrdom are unknown. A religious romance telling the love story of Saint Cecilia and Valerian appeared in Greece during the 4th century A.D., and there is a biography of St Cecilia dating from the 5th century A.D. She is purported to have been the daughter of a wealthy Roman family, a Christian from birth, who was promised in marriage to a pagan named Valerian. Cecilia, however, had vowed her virginity to God, and wore sackcloth, fasted and prayed in hopes of keeping this promise. Saint Cecilia disclosed her wishes to her husband on their wedding night. She told Valerian that an angel watched over her to guard her purity. He wanted to see the angel, so St. Cecilia sent him to Pope Urban(223-230). Accounts of how and when Valerian saw the angel vary, but one states that he was baptized by the Pope, and, upon his return to Saint Cecilia, they were both given heavenly crowns by an angel. Another version recounts that Tibertius, Valerian's brother, sees the crowns and he too is converted. The two brothers then make it their mission to bury Christian martyrs put to death by the prefect of the city. In turn, they were brought in front of the prefect and sentenced to death by the sword. Cecilia, in the meantime, continued to make many conversions, and prepared to have her home preserved as a church at her death. Finally, she too was arrested and brought before the prefect. He ruled that she should die by suffocation in the baths. Saint Cecilia was locked into the bathhouse and the fires vigorously stoked. She remained there for a day and a night but was still alive when the soldiers opened the doors. She was then ordered beheaded, but the executioner, after striking three times without severing St Cecilia's head, ran away, leaving her badly wounded. St. Cecilia Cicrular Medal The words, "St. Cecilia pray for us," form an arch over their heads. St. Cecilia hung onto life for three days after the mortal blows, preaching all the while. She made many more conversions and people came to soak up her flowing blood with sponges and cloths. There exists in Rome a church in St. Cecilia's honor that dates from about the fifth century. Her relics were believed to have been found by Pope Paschal I in 821 A.D., in the cemetery of St. Celestas. These remains were exhumed in 1599, when Cardinal Paul Emilius Sfondrati rebuilt the church of St. Cecilia, and said to be incorrupt. St. Cecilia's following flourished during the Middle Ages in Europe. Songs were sung in her name, poetry was written, paintings with St. Cecilia as the subject were created, and her feast day, on November 22 was happily celebrated. She continued to be a popular topic for the arts well into the 18th century. Hans Memling, in 1470, painted St. Cecilia playing the organ at the mystical marriage of Catherine of Alexandria. In 1584 she was named patroness of the academy of music founded in Rome. Raphael painted her at Bologna, Rubens at Berlin and Domenichino in Paris. Chaucer commemorates her in his Second Nun's Tale and Handel set John Dryden's "Ode to Saint Ceclia" to music in 1736. Never was so much made of such a tiny bit of pseudo-biographical information. St. Cecilia, said to have heard heavenly music at one moment of her life, became the patroness of all western music. Even the Andrews sisters, in 1941, recorded a song, "The Shrine of St. Cecilia." St. Cecilia Oval Medal Devotional medal with the beloved
Friday, March 20, 2020
Methamphetamine Information
Crystal Meth/Methamphetamine Information There are several different types of amphetamines, which are stimulants. Crystal methamphetamine or simply crystal meth is an illegal form of the drug. Heres what you need to know. What Is Crystal Meth? The chemical n-methyl-1-phenyl-propan-2-amine is called methamphetamine, methylamphetamine, or desoxyephedrine. The shortened name is simply meth. When it is in its crystalline form, the drug is called crystal meth, ice, Tina, or glass. See the table below for other street names of the drug. Methamphetamine is a highly addictive stimulant. How Is Crystal Meth Used? Usually, crystal meth is smoked in glass pipes, similar to how crack cocaine is used. It may be injected (either dry or dissolved in water), snorted, swallowed, or inserted into the anus or urethra. Why Is Crystal Meth Used? Females often take crystal meth because it can cause extremely rapid weight loss. However, the effects are short term. The body builds up a tolerance to the drug so weight loss tapers off and stops around six weeks after taking the drug. Also, the weight that is lost is regained once a person stops taking methamphetamine. For these reasons, combined with how addictive the drug is, methamphetamine tends not to be prescribed by doctors for weight loss. Some people take meth because of the long-lasting high that it gives. Methamphetamine causes numerous neurotransmitters to be released in the brain, producing a sense of euphoria that may last as long as 12 hours, depending on how the drug was taken. Methamphetamine is popular as a stimulant. As a stimulant, methamphetamine improves concentration, energy, and alertness while decreasing appetite and fatigue. Methamphetamines are also taken by people who are feeling depressed. They may be taken for their side effect of increasing libido and sexual pleasure. What Are the Effects of Methamphetamine Use? This is a list of effects associated with pure methamphetamine use. Because of how its made, crystal meth is never pure, so the dangers associated with taking the street drug extend beyond these effects. Common Immediate Effects EuphoriaIncreased energy and alertnessDiarrhea and nauseaExcessive sweatingLoss of appetite, insomnia, tremors, jaw-clenchingAgitation, irritability, talkativeness, panic, compulsive fascination with repetitive tasks, violence, confusionIncreased libidoIncreased blood pressure, body temperature, heart rate, blood sugar levels, bronchodilationConstriction of the walls of the arteriesIn pregnant and nursing women, methamphetamine crosses the placenta and is secreted in breast milk Effects Associated With Chronic Use Tolerance (needing more of the drug to get the same effect)Drug cravingTemporary weight lossWithdrawal symptoms including depression and anhedoniaMeth Mouth where teeth rapidly decay and fall outDrug-related psychosis (may last for months or years after drug use is discontinued) Effects of Overdose Brain damageSensation of flesh crawling (formication)Paranoia, hallucinations, delusions, tension headacheMuscle breakdown (rhabdomyolysis) which can lead to kidney damage or failureDeath due to stroke, cardiac arrest or elevated body temperature (hyperthermia) Physical and Chemical Properties of Crystal Meth Crystal meth may be distinguished from other drugs and compounds by its properties. The compound forms two enantiomers (compounds which are mirror images of each other), dextromethamphetamine and levomethamphetamine.Methamphetamine hydrochloride salt is a white crystal or crystalline powder at room temperature that is bitter-tasting and odorless, with a melting pointà between 170 to 175à à °C (338 to 347à à °F). It readily dissolves in water and ethanol.The free base of methamphetamine is a clear liquid that smells like geranium leaves. It dissolves in ethanol or diethyl ether and mixes with chloroform.Although crystal meth is a persistent pollutant in soils, it is degraded by bleach or within 30 days in wastewater that is exposed to light. Where Does Crystal Meth Come From? Methamphetamine is available with a prescription for obesity, attention deficit hyperactivity disorder, and narcolepsy, but crystal meth is a street drug, made in illegal labs by chemically altering over-the-counter drugs. Making crystal meth usually involves reducing ephedrine or pseudoephedrine, found in cold and allergy medicine. In the US, a typical meth lab employs something called the Red, White, and Blue Process, which entails hydrogenation of the hydroxyl group on the ephedrine or pseudoephedrine molecule. The red is red phosphorus, white is the ephedrine or pseudoephedrine, and blue is iodine, used to make hydroiodic acid. Making crystal meth is dangerous to the people making it and dangerous to the neighborhood where its being made. White phosphorus with sodium hydroxide can produce poisonous phosphine gas, usually as a result of overheating red phosphorus, plus white phosphorus can auto ignite and blow up the meth lab. In addition to phosphine and phosphorus, various hazar dous vapors may be associated with a meth lab, such as chloroform, ether, acetone, ammonia, hydrochloric acid, methylamine, iodine, hydroiodic acid, lithium or sodium, mercury, and hydrogen gas. Street Names for Crystal Meth Crystal meth goes by a number of names: BatuBikers CoffeeBlack BeautiesBladeChalkChicken FeedCrankCristyCrystalCrystal GlassCrystal MethGlassGo-FastHanyakHiroponHot IceIceKaksonjaeL.A. GlassL.A. IceMethMethlies QuickPoor Mans CocaineQuartzShabuShardsSpeedStove TopSuper IceTinaTrashTweakUppersVentanaVidrioYabaYellow Bam
Tuesday, March 3, 2020
Modeling Meiosis Lab Lesson Plan
Modeling Meiosis Lab Lesson Plan Sometimes students struggle with some concepts that relate to evolution. Meiosis is a somewhat complicated process, but necessary to mix up genetics of offspring so natural selection can work on a population by choosing the most desirable traits to be passed down to the next generation. Hands-on activities can help some students grasp the concepts. Especially in cellular processes when it is difficult to imagine something so small. The materials in this activity are common and easily found. The procedure does notà rely on expensive equipment like microscopes or take up a lot of space. Preparing for Modeling Meiosis Classroom Lab Activity Pre-Lab Vocabulary Before starting the lab, make sure students can define the following terms: MeiosisChromosomeCrossing OverHaploidDiploidHomologous PairGametesZygote Purpose of the Lesson To understand and describe the process of meiosis and its purpose using models.à Background Informationà Most cells in multicellular organisms like plants and animalsà are diploid. A diploidà cell has two sets of chromosomes that form homologous pairs.à A cell with only one set of chromosomes are considered haploid. Gametes, like the egg and sperm in humans, are examples haploid. Gametes fuse during sexual reproduction to form a zygote which is once again diploid with one set of chromosomes from each parent. Meiosisà is a process that starts with one diploid cell and creates four haploid cells. Meiosis is similar to mitosis and must have the cells DNA replicate before it can begin. This creates chromosomes that are made up of two sister chromatids connected by a centromere. Unlike mitosis, meiosis requires two rounds of division to get half the number of chromosomes into all of the daughter cells.à à à à à à Meiosis begins with meiosis 1 when homologous pairs of chromosomes will be split.à The stages of meiosis 1 are similarly named to the stages in mitosis and also have similar milestones: prophase 1: homologous pairs come together to form tetrads, nuclear envelope disappears, spindle forms (crossing over may also happen during this phase)metaphase 1: tetrads line up at the equator following the law of independent assortmentanaphase 1: homologous pairs are pulled aparttelophase 1: cytoplasm divides, nuclear envelope may or may not reform The nuceli now only have 1 set of (duplicated) chromosomes. Meiosis 2 will see the sister chromatids split apart. This process is just like mitosis. The names of the stages are the same as mitosis, but they have the number 2 after them (prophase 2, metaphase 2, anaphase 2, telophase 2). The main difference is that the DNA does not go through replication before the start of meiosis 2. Materials and Procedure You will need the following materials: String4 different colors of paper (preferably light blue, dark blue, light green, dark green)Ruler or Meter StickScissorsMarker4 paper clipsTape Procedure: Using 1 m piece of string, make a circle on your desk to represent the cell membrane. Using a 40 cm piece of string, make another circle inside the cell for the nuclear membrane.Cut 1 strip of paper that is 6 cm long, and 4 cm wide from each color of paper (one light blue, one dark blue, one light green, and one dark green) Fold each of the four strips of paper in half, lengthwise. Then place the folded strips of each color inside the nucleus to represent a chromosome before replication. The light and dark strips of the same color represent homologous chromosomes. At one end of the dark blue strip writeà a large B (brown eyes) on the light blue make a lower case b (blue eyes). On the dark green at a tip write T (for tall) and on the light green write a lower case t (short)Modeling interphase: to represent DNA replication, unfold each paper strip and cut in half lengthwise. The two pieces that result from cutting each strip represent the chromatids. Attach the two identical chromati d strips at the center with a paperclip, so an X is formed. Each paper clip represents a centromere.4 Modeling prophase 1:à remove the nuclear envelope and put it aside. Place the light and dark blue chromosomes side by side and the light and dark green chromosomes side by side.à Simulate crossing over by measuring and cutting a 2 cm tip for a light blue strip that includes the letters you drew on them earlier. Do the same with a dark blue strip. Tape the light blue tip to the dark blue strip and vice versa. Repeat this process for the light and dark green chromosomes.Modeling metaphase 1: Place four 10 cm strings inside the cell, so that two strings extend from one side into the center of the cell and two strings extend from the opposite side into the center of the cell. The string represents the spindle fibers. Tape a string to the centromere of each chromosome with tape. Move the chromosomes to the center of the cell. Make sure that the strings attached to the two blue chromosomesà come from opposite sides of the cell (same for the two green chromosomes).à Modeling anaphas e 1: Grab onto the ends of the strings on both sides of the cell, and slowly pull the strings in opposite directions, so the chromosomes move to opposite ends of the cell. Modeling telophase 1: Remove the string from each centromere. Place a 40 cm piece of string around each group of chromatids, forming two nuclei. Place a 1 m piece of string around each cell, forming two membranes. You now have 2 different daughter cells. MEIOSIS 2 Modeling prophase 2: Remove the strings that represent the nuclear membrane in both cells. Attach a 10 cm piece of string to each chromatid.Modeling metaphaseà 2: à Move the chromosomes to the center of each cell, so they are lined up at the equator. Make sure the strings attached to the two strips in each chromosome come from opposite sides of the cell.Modeling anaphaseà 2: Grab onto the strings on both sides of each cell, and pull them slowly inà opposite directions. The strips should separate. Only one of the chromatids should have the paper clip still attached to it.Modeling telophaseà 2: Remove the strings and paper clips. Each strip of paper now represents a chromosome. Place a 40à cm. piece of string around each group of chromosomes, forming four nuclei. Place a 1m string around each cell, forming four separate cells with only one chromosome in each. à Analysis Questions Have students answer the following questions to understand the concepts explored in this activity. What process did you model when you cut the strips in half in interphase?What is the function of your paper clip? Why is it used to represent a centromere?What is the purpose of placing the light and dark strips of the same color side by side?How many chromosomes are in each cell at the end of meiosis 1? Describe what each part of your model represents.What is the diploid chromosome number of the original cell in your model? How many homologous pairs did you make?If a cell with a diploid number of 8 chromosomes undergoes meiosis, draw whatà the cell looks like after Telophase 1.What would happen to an offspring if cells did not undergo meiosis before sexual reproduction?How does crossing over change diversity of traits in a population?Predict what would happen if homologous chromosomes did not pair in prophase 1. Use your model to show this.
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