Chemosynthesis Definition and Examples

Chemosynthesis Definition and Examples Chemosynthesis is the conversion of carbon compounds and other molecules into organic compounds. In this biochemical reaction, methane or an inorganic compound, such as hydrogen sulfide or hydrogen gas, is oxidized to act as the energy source. In contrast, the energy source for photosynthesis (the set of reactions through which carbon dioxide and water are converted into glucose and oxygen) uses energy from sunlight to power the process. The idea that microorganisms could live on inorganic compounds was proposed by Sergei Nikolaevich Vinogradnsii (Winogradsky) in 1890, based on research conducted on bacteria which appeared to live from nitrogen, iron, or sulfur. The hypothesis was validated in 1977 when the deep sea submersible Alvin observed tube worms and other life surrounding hydrothermal vents at the Galapagos Rift. Harvard student Colleen Cavanaugh proposed and later confirmed the tube worms survived because of their relationship with chemosynthetic bacteria. The official discovery of chemosynthesis is credited to Cavanaugh. Organisms that obtain energy by oxidation of electron donors are called chemotrophs. If the molecules are organic, the organisms are called chemoorganotrophs. If the molecules are inorganic, the organisms are terms chemolithotrophs. In contrast, organisms that use solar energy are called phototrophs. Chemoautotrophs and Chemoheterotrophs Chemoautotrophs obtain their energy from chemical reactions and synthesize organic compounds from carbon dioxide. The energy source for chemosynthesis may be elemental sulfur, hydrogen sulfide, molecular hydrogen, ammonia, manganese,  or iron. Examples of chemoautotrophs include bacteria and methanogenic archaea living in deep sea vents. The word chemosynthesis was originally coined by Wilhelm Pfeffer in 1897 to describe energy production by oxidation of inorganic molecules by autotrophs (chemolithoautotrophy). Under the modern definition, chemosynthesis also describes energy production via chemoorganoautotrophy. Chemoheterotrophs cannot fix carbon to form organic compounds. Instead, they can use inorganic energy sources, such as sulfur (chemolithoheterotrophs) or organic energy sources, such as proteins, carbohydrates, and lipids (chemoorganoheterotrophs). Where Does Chemosynthesis Occur? Chemosynthesis has been detected in hydrothermal vents, isolated caves, methane clathrates, whale falls, and cold seeps. It has been hypothesized the process may permit life below the surface of Mars and Jupiters moon Europa. as well as other places in the solar system. Chemosynthesis can occur in the presences of oxygen, but it is not required. Example of Chemosynthesis In addition to bacterial and archaea,  some larger organisms rely on chemosynthesis. A good example is the giant tube worm which is found in great numbers  surrounding deep hydrothermal vents. Each worm houses chemosynthetic bacteria in an organ called a trophosome. The bacteria oxidize sulfur from the worms environment to produce the nourishment the animal needs. Using hydrogen sulfide as the energy source, the reaction for chemosynthesis is: 12 H2S 6 CO2 → C6H12O6 6 H2O 12 S This is much like the reaction to produce carbohydrate via photosynthesis, except photosynthesis releases oxygen gas, while chemosynthesis yields solid sulfur. The yellow sulfur granules are visible in the cytoplasm of bacteria that perform the reaction. Another example of chemosynthesis was discovered in 2013 when bacteria were found living in basalt below the sediment of the ocean floor. These bacteria were not associated with a hydrothermal vent. It has been suggested the bacteria use hydrogen from the reduction of minerals in seawater bathing the rock. The bacteria could react hydrogen and carbon dioxide to produce methane. Chemosynthesis in Molecular Nanotechnology While the term chemosynthesis is most often applied to biological systems, it can be used more generally to describe any form of chemical synthesis brought about by random thermal motion of reactants. In contrast, mechanical manipulation of molecules to control their reaction is called mechanosynthesis. Both chemosynthesis and mechanosynthesis have the potential to construct complex compounds, including new molecules and organic molecules. Resources and Further Reading Campbell, Neil A., et al. Biology. 8th ed., Pearson, 2008.Kelly, Donovan P., and Ann P. Wood. â€Å"The Chemolithotrophic Prokaryotes.† The Prokaryotes, edited by Martin Dworkin, et al., 2006, pp. 441-456.Schlegel, H.G. â€Å"Mechanisms of Chemo-Autotrophy.† Marine Ecology: a Comprehensive, Integrated Treatise on Life in Oceans and Coastal Waters, edited by Otto Kinne, Wiley, 1975, pp. 9-60.Somero, Gn. â€Å"Symbiotic Exploitation of Hydrogen Sulfide.† Physiology, vol. 2, no. 1, 1987, pp. 3-6.

Creating Your Own Lesson Plan Calendar

Creating Your Own Lesson Plan Calendar It is easy to become overwhelmed when you begin planning units of study and individual lessons for a school year. Some teachers  start with their first unit and continue until the year ends with the attitude that if they didnt complete all the units then thats the way life is. Others try to plan their units in advance but run into events that cause them to lose time. A lesson plan calendar can help by giving a realistic overview of what they can expect in terms of instructional time.   Materials Needed: Blank CalendarSchool CalendarPencil Steps for Creating  a Lesson Plan Calendar Get a blank calendar and a pencil. You dont want to use pen because you will probably need to add and erase items over time.Mark off all vacation days on the calendar. I generally just draw a big X right through those days.Mark off any known testing dates. If you dont know the specific dates but you do know in which month testing will occur, write a note at the top of that month along with the approximate number of instructional days you will lose.Mark any scheduled events that will interfere with your class. Again if you are unsure of the specific dates but know the month, make a note at the top with the number of days you expect to lose. For example, if you know that Homecoming occurs in October and you will lose three days, then write three days at the top of the October page.Count up the number of days left, subtracting for days noted at the top of each month.Subtract one day each month for unexpected events. At this time, if you want, you can choose to subtract the day before va cation begins if this is typically a day that you lose. What you have left is the maximum number of instructional days you can expect for the year. You will be using this in the next step.Go through the Units of Study necessary to cover the standards for your subject and decide the number of days you think will be needed to cover each topic. You should use your text, supplementary materials, and your own ideas to come up with this. As you go through each unit, subtract the number of days required from the maximum number determined in step 7.Adjust your lessons for each unit until your result from Step 8 equals the maximum number of days.Pencil in the start and completion date for each unit on your calendar. If you notice that a unit would be split by a long vacation, then you will need to go back and readjust your units.Throughout the year, as soon as you find out a specific date or new events that will remove instructional time, go back to your calendar and readjust.

Security Plan Essay Example | Topics and Well Written Essays - 4250 words

Security Plan - Essay Example Hacking 6 Human Errors 7 Unauthorized Access 7 Information Destruction By Dissatisfied Employees 7 Electronic Threats To Organization’s Information Holdings 8 Organization’s Actual Threat For Information Holdings 9 Security Plan 9 Physical Countermeasures 10 Electronic Countermeasures 12 Human Countermeasures 15 Information Security Education And Awareness Program 16 Updating The Education And Awareness Program 18 Measures Used To Test The Efficacy Of Plan 19 Conclusion and Recommendations 20 References 21 Bibliography 24 Introduction With the rapid improvement in information system and exceptional development of internet, the information security has become a critical issue for every organization. Information is acknowledged as an important monetary asset for organizations, thus, it needs to be secured consequently. In present days, organizations are becoming greatly dependent on information system which clearly manages serious portion of organization’s fundamental activities. The role of technology has transformed from a validation tool to the center of main business (Aoufi, 2011). As the technology has improved, people have also become more aware regarding possible threats for information theft, cybercrime and other fraudulent activities. Thus, there is a need to strengthen the information security system in every organization by identifying and removing potential threats. ObjectivesObjectives The objective of this study is to identify and describe the risks of organizations information holdings with respect to physical, human and electronic threats. The study also illuminates a security plan for physical, human and electronic counter measures for reducing the information threats of a business organization situated in an Australian city. Besides, there is need for adequate education and awareness program for minimizing risks in the information system. A comprehensive information security education and awareness plan is developed in this paper which can help to enhance the information security. Scope The scope of information security is to support the safety, control and administration of organization’s valuable information. This study covers the areas such as known threats for organization’s security and several countermeasures which can help people to gain insight about maintaining strong information system in organization. Furthermore, the study describes the methods for developing education and training to employees for increasing knowledge and skill to avoid security problems. Physical Threat To Organization’s Information Holdings In this digital information age, physical threats can have significant impact on the information holdings of organizations. Thus, physical threats need adequate attention besides other cyber threats. The scope of physical threat is much inclusive compared to other threats in terms of financial loss. Physical threat can arise at any form and at any time. An organization can face the following physical threats for their information holdings (Bidgoli, 2006). Theft Theft is regarded as one of most common risks for organizations’ information holdings. Digital information can be physically stolen by people who come from security and Information Technology (IT) background. Outsiders might break or sneak into any organization’s network and steal information. Insiders also can enter into a part of organization for accessing information which they have no right to access or they may abuse access rights which are part of their tasks. Furthermore, physical assaults against rational security can simply be executed by experts (Lindstrom, 2003). Sabotage Sabotage is fairly similar to theft. Sabotage is intentional damage of information holdi

Energy Outlook Report Coursework Example | Topics and Well Written Essays - 3000 words

Energy Outlook Report - Coursework Example The changes in the oil prices and the demand, supply and consumption levels in the market would highly affect the energy sector in Russia. The consumption of natural gas as major energy resource will be attaining momentum and the coming twenty years can be labelled as the era of gas as a main source of energy. The market position of Russia as a leading country in the global energy market may be affected by different changes which the country would try to balance through their strategies. Russia is likely to be affected by the changing situations in the market in the forecasted period. The exports of oil and gas from Russia are forecasted to be lower due to the decrease in the demand levels for these sources of energy across the world. The high costs and the existing system of taxation are likely to put a constraint on the energy resources of Russia as exported in the global energy market. Russia is a leading country with respect to world energy and is a significant player in the international market of energy and power. The energy market of Russia is a critical contributor to the world economy and also directly influences the stability of the economy of Russia. Therefore, a comprehensive analysis of the development and future outlook for the energy sector of Russia with respect to the global energy market perspective is significant in understanding and planning the development of the economy. The analysis of the future of the energy sectors in Russia and the global market is done to evaluate and analyse the strategies of the country with respect to the development of the energy market and the economy of the country. The global energy landscape has been undergoing major transformations after the event of the economic crisis of 2008. The characteristics of the energy outlook has been demonstrating increasing volatility in the prices of the hydrocarbons, the changing demand and supply equations, increasing level of

History and myth Essay Example for Free

History and myth Essay The Worlds Wife revises fairytale, history and myth and reworks it into contemporary, feminist fables. With reference to three of the poems in the volume examine the techniques employed by Duffy in writing contemporary feminist fables. Duffys volume The Worlds Wife is a collection of dramatic monologues where Duffy becomes a ventriloquist inventing the words, which famous, silent, wives from history or myth might have said. Her use of humour and play on clichi s creates a collective female voice where dominant male characters are being criticised. Duffy reworks contemporary feminist fables and adopts different personae by employing different techniques, which are particularly displayed in her poems, Mrs Midas, Mrs Lazarus and Mrs Aesop. Duffys use of witty humour in the poem Mrs Aesop allows her to condescend the male counterpart, by turning his famous fables against him and questioning his manhood. On the contrary, Mrs Lazarus portrays a more emotional persona grieving over her husbands death, where her other half fails to consider the impact of his return. Similarly, in Mrs Midas, the male character is overcome by greed, blinding his ability to comprehend the repercussions of his actions. The metaphorical autobiographies allow Duffy to adopt a variety of dramatic personae and assume a multiplicity of voices, which portray issues and views sensitive to her own. She explores the notion of the self in relation to the other, particularly in the poem, Mrs Midas. The poet is able to present a wide range of emotions through the practical persona that feels a sense of exasperation due to her husbands selfishness. The sensual qualities of the persona are highlighted through the use of soft sounds, breath brow, and my fingers wiped the others glass. She is then depicted as multitalented, especially in comparison to her husband who was standing under the pear-tree snapping a twig. His pointless and ridiculous activity belittles his usefulness and thus increasing his wifes, as it does not require much talent to carry out such an activity. The persona undertakes an anecdotal approach, principally when the tragedy is building up, belying the serious concern, I said and What in the name of God is going on? show the use of colloquial language, which help the personas voice emerge. The phrasing used throughout the poet emphasizes her practicality and ability to make sense out of any situation, I served up the meal and So he had to move out, illustrate that she is not theatrical, but is calm and logical, which is a comparison to her partners childish and immature behaviour, he toyed with his spoon. The persona is able to rise above him, assert her authority and her use of bitter sarcasm introduces comedy to the poem. Duffys use of the clichi , which is commonly present in her poems, is used to show how worthless he has become and how ashamed and fearful she is for him, as he is a fool who could not think beyond his short-term greed. Similarly, Mrs Lazarus, also has to face the consequences of her husbands return after she finally manages to deal with her grief over his death and move on. The dramatic persona created in this poem is extremely loyal to her husband and devastated at the fact that she has lost her other half. Howled, shrieked, clawed and one empty glove reinforce the imagery of suffering and grief-stricken state. She is a persona very expressive of her emotions and goes through the entire pain of her loss, even to the extent where there are images of suicide because of what she is feeling, double knot round my bare neck. The alliteration of soft, slept.. single.. stuffed and harsh sounds, gone gutted glove, bring emphasis to the range of her emotional suffering. As her memory of him and grief is receding, she develops a more practical, factual tone in her diction, Then he was gone, showing that she has finally moved on. When her husband returns, her phrasing and diction changes and it begins to sound more harsh and bitter, rotting graves slack chew, as a reflection of the fact that he is insensitive to her emotions, despite everything she has been through.

Toll like receptors and their therapeutic potential Essay -- essays re

Cellular Basis Of Disease: Why has the discovery of Toll-like receptors revolutionised our understanding of how the innate immune system works, and what is the therapeutic potential? The body has two immune systems: the innate immune system and the adaptive immune system. Adaptive, or acquired, immunity refers to antigen-specific defence mechanisms that take several days to become protective and are designed to react with and remove a specific antigen. This is immunity develops throughout life. Innate immunity refers to antigen-nonspecific defence mechanisms that a host uses immediately or within several hours after exposure to an antigen. This is the immunity that you are born with, and is the initial response by the body to eliminate microbes and prevent infection. It is in the innate immune system that Toll-like receptors are important in helping our understanding. The most important role of the innate immune system is to react rapidly to infectious agents with the initiation an inflammatory response, and to shape the subsequent adaptive immune responses. There are currently two different models for immune system induction. The first model predicts the recognition of non-self determinants on pathogens, and the other, more controvertial, model predicts that there is recognition of damage or danger to self-tissues. In the first model, pathogens are recognised by either specific or general components of their structure. A system referring to the patterns that are recognised are the pathogen associated molecular patterns (PAMPs) and the receptors recognising them are pattern recognition receptors (PRRs). The second model, put forward by Matzinger, is that it is the danger itself that is sensed. It is argued that it is tissue damage or cellular debris from necrotic cells that sends the signal for the immune system to initiate a response. The presence of DNA or RNA, that shouldn't be outside of the cell, may cause an alarm signal. Heat shock proteins released from the cell, or mannose that is normally cleaved off, may also serve as an alarm signal. It is suggested that the PRRs are there to recognise these endogenous signals from ruptured cells, and not to recognise pathogens as proposed in the first model. It is the first model that is most widely accepted in the scientific community, and it is this model of events that I shall describe. Activation of the ... ...77(9):7059-65 9. Horng T. et al., 2002. The adaptor molecule TIRAP provides signalling specificity for Toll-like receptors. Nature. 420(6913):329-33 Takatsuna H., et al. 2003. Identification of TIFA as an adapter protein that links TRAF6 to IRAK-1 in IL-1 receptor signaling. J Biol Chem. 2003 Yang L, Blumbergs PC, Jones NR, Manavis J, Sarvestani GT and Ghabriel MN (2004). Early expression and cellular localization of proinflammatory cytokines interleukin-1beta, interleukin-6, and tumor necrosis factor-alpha in human traumatic spinal cord injury. Spine. 29: 966-71 Therapeutic targeting of Toll-like receptors for inflammatory and infectious diseases. O'Neill LA. Nat Rev Drug Discov. 2002 Oct;1(10):797-807 Role of toll-like receptors and their adaptors in adjuvant immunotherapy for cancer. Seya T, Akazawa T, Uehori J, Matsumoto M, Azuma I, Toyoshima K. Anticancer Res. 2003 Nov-Dec;23(6a):4369-76 Toll-like receptor signaling in anti-cancer immunity. Okamoto M, Sato M. J Med Invest. 2003 Feb;50(1-2):9-24 H. Hemmi, et al., "A toll-like receptor recognizes bacterial DNA," Nature, 408(6813):740-5, 7 December 2000. bst.portlandpress.com/ bst/031/0637/bst0310637.htm

Value of Communication Skills in the Workplace

The value of communication in the workplace is important. Employers should make employees aware of what Is happening within the workplace. Organizing meetings regularly would help to keep a strong flow of communication and a positive attitude toward the company and each other. Enhance Workplace Communication at 24-Hour Operations (2011) is confident that communication can be improved by keeping logs.Using electronic or paper logs would help to point out unwanted problems and correct them as soon as possible. Technology today has changed our world drastically. According to Tensions (2011) managers who have good communication skills help to create a good working atmosphere. Communication today Is mostly made up of testing, emails, and social media leaving face-to-face communication a thing of the past. Technology regarding personal communication should only be used as a quick fix solution providing face- to-face communication is not available at the current time.According to Hungry ND Kooky (201 1 ) face-to-face communication and computer-mediated communication differ when group performance Is Involved. The effects of face-to-face communication proves to have a more positive outcome workplace usually does not happen unless a serious problem has occurred and immediate attention is needed. Brown, Owens, and Bradley (2013) felt cancer patients that are able to continue working need to know how to properly address their employer concerning benefits.The fact that people should be trained on how to properly communicate is surprising because face-to-face communication allows en to be able to clearly express themselves in an understanding way. Many mistakes have occurred due to the lack of direct communication. Most people especially some older ones have no idea how to communicate using different methods of communication other than face-to-face communication. Making face-to- face communication a priority in the workplace is important and should be used as much as possibl e. The lack of effective communication in the workplace can sometimes create negative outcomes.Enhance Workplace Communication at 24- Hour Operations (2011) advised workers can be vulnerable to communication reawaken in the workplace due to fatigue, shift changes, and long breaks built into the schedule. When comparing face-to-face communication to all other forms of communication the outcome is usually all other meaning testing, social media, email, and fax. Using face-to-face communication gives each person the opportunity to ask questions by speaking instead of typing. The majority of the population that use technology methods of communication have no idea of the value of face-to-face communication.Management should Join forces to make sure all future plans to communicate in the oracle is done by direct contact instead of technology based contact. Timing (2011) suggest that promoting good communication in a clinical setting will ensure competence in a range of skills. Mangers sho uld ensure staff members are skilled and effective communicators. Many forms of communicating in the workplace should be readily available to each employee. With the way communication has changed managers can deliver important information to employees without speaking to them directly.Managers are the first point of contact for the employee but, some managers are not always available to communicate erectly with their teams. So, in this case indirect communication is acceptable as long as it is easily understood. According to Wallace, Durance, Helmut, and Marcia (2012) communication in the workplace is important in all kinds of industries. Communication is a critical part of our world so everyone must be able to communicate in some way in order to keep things moving in the right direction. Without some form of communication everyone would have to guess which way is right and which way is wrong.Unfortunately in some cases the flow of communication is lacking in many ways and because o f it errors and sometimes tragedies can occur. Wallace et al. (2012) presented different forms of communication starting with Relationship and Interpersonal Communication. This form of communication skills deals with individuals initiating, maintaining, or disengaging from two types of work- related relationships: inter- organizational collegial friendships and internships as well as all other outside sources affiliated with the workplace.Wallace et al. (2012) also introduced another form of communication called online participation. Mediated communication, represents the willingness and the ability to participate in online training. Using social networking is a form of communication that is questionable at times due to privacy issues involved. A company has to make sure they are equipped with strong security measures for any online activity due to company interaction. Intercrop communication is a form of communication introduced by Wallace et al. 2012) that focus on communication w ithin and across groups and how it affects social relations among members of each group. One important part of this group focused on concerns of older more experienced workers being managed by young least experienced workers. This form of communication is good for employees because the young managers being mentored by the older workers will keep a good flow of communication within the workplace. Because of the efforts presented by older employees training should have a positive effect due to their knowledge.Speaking and listening as explained by Wallace et al. (2012) is a good example. Listening is important and so is speaking because the listener have to be able to clearly understand the speaker. The speaker should make sure he/she is speaking clearly and at a tone where the listener is not offended, threatened, or afraid to spoon or ask questions if needed. Management should work hard to make sure a positive attitude is displayed at all times while Interacting with employers. Alth ough body language does not make any noise it still is a part of communication.Employees will sometimes feed off of whatever energy they get from the employer. Bad communication could have a negative impact for production and cause negative attitudes within the workplace. Good communication between employers and employees will have a positive impact in the workplace. The outcome of the study done by Wallace et al. (2012), describes speaking and existing as being the least effective. Companies affiliated with the sale of products would benefit more by having their potential customers use the internet for display and colorful presentations.While this way of communication may work for some it may not work for all. The computer and the internet are not the best ways to communicate for everyone. Some young and old would rather not deal with the process of getting on the internet and looking for information. Other forms of communication which are looked upon as non-verbal communication ar e not mentioned nearly as much as other forms of communication when the subject of immunization is presented. Eyes, hands, facial, and body language, these forms of communication are among the oldest ways of communicating and are still effective.If a person is speaking with another person and one of them rolls their eyes, or throw their hands this form of communication is looked upon as being dissatisfied, rude, or unhappy with what is being said or done at the current time. A smile, smirk, grin, or a face without a smile all says something is either pleasant or unpleasant. Although these forms of communication are not talked about they are still being used. Smiley faces etc. Re available to attach to text or email to express what mood a person is in at the particular moment.Sometimes if we stop, look, and listen closely, we could possibly stop a tragedy before it occurs because non-verbal communication can be as effective as any other form of communication. Timing employees. So usi ng good communication provides employees informal support and leadership. Managers have to be able to solve conflicts and settle disagreements without taking sides. Because of this the method of communication used by a manager could possibly make a difference in the outcome.Managers who have excellent communication skills create good working atmospheres that ultimately improve confidence, motivation, and morale in the workplace. When managers communicate with employees they are expected to demonstrate a high level of professionalism. Because managers are looked upon as role models to their employees they have to be able to effectively deal with many situations calmly. A plus for providing good communication skills in the workplace would be for all companies to have company meetings regularly.Managers are usually scheduled for tenting or other work related activities making them less available to answer questions or provide help or advice to employees. A plan to appoint a person or p ersons to become team leaders or assistants would also be a plus for providing good communication in the workplace. According to Ghana and Venerates (2013) the IS research contributed to the understanding of technology and communication in the workplace shows how it could affect Job performance. The outcome regarding the use of online and offline networks shows offline networks were a better option for having good and effective bob performance.So, when looking into additional help with management duties the chosen one should be well trained and knowledgeable about the department. This person should have immediate access to the department manager if needed. By providing the extra person to assist in the department the communication flow will still continue. The majority of the population that use technology methods of communication have no idea of the importance of face-to-face communication. The convenience of using technology communication has wiped out any chance of ever getting b ack the best way to communicate.Some companies provide technology communication to upper management making sure they are able to communicate with them as needed but, since technology tend to fail at times this may not be the best way to go. Since the internet will go down at times making testing, emails, or social media unavailable face-to-face communication is still the best way to go. If all else fail a designated office filled with kiosk for employees would be a good idea for communicating by way of face time this would allow for face-to-face communication and one on one time with management if needed.

Exercise 43

CHAPTER 43 1) 1. C 7. B 2. B 8. A 3. A 9. B 4. B 10. C 5. C 11. B 6. A 12. B 2) Describe the process of synapsis The pairing of homologous chromosomes (23 tetrads become attached to spindle fibers & begin to align on the equator. 3) How does crossover introduce variability in the daughter cells? The homologues separate from one another, breaking & exchanging parts- where crossovers occur 4) Define homologous chromosomes Egg & sperm chromosomes that carry genes for the same traits (1 paternal, 1 maternal) 5) 1. Primitive stemspermatogonium 2.Haploidsecondary spermatocyte, spermatid, sperm 3. Provides nutrients to developing spermsustentacular cells 4. Products of meiosis IIspermatid 5. Product of spermiogenesissperm 6. Product of meiosis Ispermatocyte 6) Why are spermatids not considered functional gametes? They are non-motile and have too much excess baggage to function well in a reproductive capacity. 7) Differentiate between spermatogenesis and spermiogenesis Spermiogenesis is the final stage of spermatogenesis, which sees the maturation of spermatids into mature, mobile spermatozoa. Formation of haploid gametes by male sloughing off excess spermatid cytoplasm to form a functioning sperm 8) Draw a sperm, label: acrosome, head, mid piece and tail. Beside each label, note the composition, and function of each sperm structures. Acrosome ( composition & function) penetrating device containing digestive enzymes Head ( composition & function) genetic region, nucleus Mid piece ( composition & function) contains mitochondria which provide ATP Tail ( composition & function) contractile filaments (loco motor region) 9) The lifespan of a sperm is very short? What anatomical characteristics might lead you to suspect this even if you don't know its life span? No cytoplasm in which to store nutrients 10) The sequence of events leading to germ cell formation in the female begins during fetal development, by the time the child is born; all viable oogonia have been converted to Primary oocytes How does the total germ cell potential of the female compare to that of the male? Much smaller, and the total number is predetermined 11) Female gametes develop n structures called follicles. What is a follicle? A saclike structure containing follicle cells in one or more layers that enclose a developing gamete. How are primary and vesicular follicles anatomically different? Primary follicle=primary oocyte; a single layer of cuboidal/columnar follicle cells Secondary follicle=several layers of cuboidal/columnar cells collectively called the membranous granulose which secrete follicular fluid What is a corpus luteum? It is what's left of the follicle after a woman ovulates, glandular ovarian structure that produces progesterone. The ruptured vesicular follicle is converted to corpus leuteum. 12) What is the major hormone produced by the vesicular follicle? Estrogen What is the major hormone produced by the corpus luteum? Progesterone (and some estrogen) 13) 1. B 2. C 3. C 4. D 14) The cellular product of spermatogenesis is four _____________; the final product of oogenesis is one ________ and three ____________ Spermatids, ovum, polar bodies. What is the function of the unequal result of oogenesis in the female? To provide the ovum or functional gamete w/adequate nutritional reserves so that it can survive its journey to the uterus. What is the fate of the 3 tiny cells produced during oogenesis? Why? They will deteriorate; they lack sustaining cytoplasm w/nutrient reserves. 15) 1. FSH 2. LH 3. Estrogen and Progesterone 4. Estrogen 5. LH 6. LH 16) Why does the corpus luteum deteriorate toward the end of the ovarian cycle? Because blood levels of the anterior pituitary hormone LH are very low 17) 1. B 2. A 3. B 4. B 5. A 18) What uterine tissue undergoes dramatic changes during the menstrual cycle? Endometrium 19) When during the female menstrual cycle would fertilization be unlikely? Explain why? Anytime but the three-day interval (days 14-16) around ovulation (28 day cycle assumed) 20) Assume that a woman could be an â€Å"on demand† ovulator like the rabbit, in which copulation stimulates the hypothalamic-anterior pituitary axis and causes LH release, and an oocyte was ovulated and fertilized on day 26 of her 28-day cycle. Why would a successful pregnancy be unlikely at this time? The uterine lining goes through a cycle of building up every cycle to accept an embryo. By the time day 26 comes along, the lining is getting ready to slough off during the next period. Most likely the lining of the uterus would not be able to support the implantation and development of the embryo at this time.

Comparing Araby and Going to the Moon

Comparing Araby and Going to the Moon Free Online Research Papers When one talks about the allure of the other, many different meanings can rise up into the conversation. Allure is defined as an attractive or tempting quality possessed by somebody or something, often glamorous and sometimes risky. In both short stories, Araby and Going to the Moon, the allure of the other, love or acceptance, shared a similar yet different pattern as it happens throughout the two stories. For the stories, the protagonists were attracted to a female character because both of them seemed capable of providing an imaginary satisfaction, either for love or recognition that would fill up the void of loneliness and isolation. Due to the appeal of the unknown, both of the protagonists were allured to a location that they believed to be secure and harmonious. Then at the end, both protagonists realized that what they desired, love or acceptance, can not be fulfilled because their deep emotions and feelings blindly misled them. The main similarity between the two stories is that both protagonists were drawn towards a female character because they portrayed the superficial appeal of love and acceptance. In Araby, the boy was attracted to the girl because he is a senior teenager who as all other teenagers is interested in the matter of sexuality. The author illustrated that boy has no way of escaping the allure of the female character in the story, Mangan’s sister, because she composed of an attractive appearance and body figure. As a result, her body figure and movements became the main focus on his mind. â€Å"Her dress swung as she moved her body and the soft rope of her hair tossed from side to side† (288, James Joyce). Instead of realizing that he was really interested in sexuality, he blindly led himself to believe this is a high ordered romance. Due to the appeal revealed from Mangan’s sister, the boy was blindly infatuated with her. Evidence supporting this is that the author use d a metaphor to imply that the narrator felt like a harp controlled by Mangan’s sister. In the other story, Going to the Moon, the young protagonist was drawn to a female character who he believes can connect him with the outside world and provides him with protection and acceptance. She is so exceptionally different from the others that she â€Å"stood out from the stiff formality of the priests and nuns like a burst of colour in a grey landscape† (213, Nino Ricci). The reasons for her difference are her striking beauty, rich and colourful apparel, and unique ways of teaching. Therefore, including the protagonist, all the kids admire her to a great extend. The moon in the unique moon game started by her symbolizes an ideal world where the boy believes he can be accepted and welcomed. Since the game was organized by her, she then became the connection to his hopes of acceptances. So in both stories, the young and innocence of the story led them to succumb to the superf icial appeal of love and acceptance because they seemed so interesting and comforting. Due to the appeal of love and acceptance, both protagonists had a location in mind that reflects their hopes and dreams. In the story Araby, the magical place in the mind of the boy was the bazaar Araby. This place is implied with significance and heavenly decoration because it is where the protagonist can start his plan of consummating his love. Since the boy promised the girl that he will retrieve something back for her from the bazaar, the mission to the bazaar then represents a mission of winning the girl’s love. The bazaar then was constantly on his mind, â€Å"†¦the word Araby were called to me through the silence in which my soul luxuriated and cast an Eastern enchantment over me† (Joyce 289). In the story, Going to the Moon, the desirable location the protagonist dreams of was U.S.A. His family and he were originally planning to go to U.S.A, and they see it with a greater importance and significance in comparison to Canada. This was illustrated at the begi nning where Windsor, Canada, was like a purgatory. An allusion was also used to show the protagonist’s desire to go to U.S.A by comparing their family to Dorothy which â€Å"falling asleep on the road to Emerald city†, or U.S.A. Not only so, the protagonist view the building structure in U.S.A with high respect and admiration, â€Å"†¦that skylines tall buildings stood unnaturally still and crisp in the cold air†¦they had a strange, unreal quality†¦.my eyes could not believe their own power to hold so much in a glance† (Ricci 210). So for both of the stories, the appeal of the unknown caused the allure to a location, changing from feeling or emotion to a materialized desire for a place. High expectations usually conclude with a note that disappoints the person with the hope. Just as in the story, Araby, where the protagonist came into a realization that the girl does not love him as she treated him out of duty, and in some way, she seemed to be using him to buy things for her. The author prelude the realization by showing a flat, meaningless conversation between the protagonist and a saleswoman in comparison to the flirtation shared between the same women and two other men. Mangan’s sister is just like the saleswoman, treat the boy out of duty rather than the passion he desired. At the end, the reality was learnt by the boy in the harshest way possible, as he saw himself â€Å"as a creature driven and derided by vanity; and my eyes burned with anguish and anger† (292, James Joyce). The realization in the story Going to the Moon is that U.S.A was not a utopia as imagined. Due to the death of the astronauts and riots in Detroit, the boy can no longer mislead himself to believe that U.S.A is a safe and secure country. Not only that, the death of the astronauts had changed Miss Johnson, as she changed and acted in the same way as all other teachers in the school. The change in her, the termination of the moon game had completed destroyed the boy’s hope and faith of the easy acceptance into a welcoming world. However, though, the boy had began to accept his life, his position in Canada, because it seems Windsor can be a peaceful place to be in comparison to U.S.A, because at the end he called Windsor â€Å"home†. Overall, the tough realizations caused pains and sufferings to both protagonists as they cannot be satisfied with their hopes and desire. However, the same time they learn from these harsh lessons, they advance in life significantly. The allure of the other plays a major role in both Araby and Going to the Moon. In both short stories, the main characters were attracted to a certain character for a variation of reasons. It could be to fill a void in their life, or to fulfill an imagination or dream they have had in the past. Either way, the allure controlled them to the point where they discovered that is wasn’t safe or pleasant like the main characters thought it would be. The disappointment of the allure not being what was expected hit the protagonists hard and in a deep manner. The results changed their way of life and way of thinking, which made them see the world in a different way. In conclusion, one cannot always go with the allure of the other and expect perfect results, but one can always try and accept the results regardless. Research Papers on Comparing "Araby" and "Going to the Moon"Mind TravelHonest Iagos Truth through DeceptionWhere Wild and West MeetTrailblazing by Eric AndersonThe Masque of the Red Death Room meaningsAnalysis Of A Cosmetics AdvertisementBook Review on The Autobiography of Malcolm XComparison: Letter from Birmingham and CritoEffects of Television Violence on ChildrenHip-Hop is Art

Your Guide through the Receptionist Interview Maze

Your Guide through the Receptionist Interview Maze Are you on the hunt for the perfect receptionist position? Finding the ultra-competitive job search jungle a bit daunting? Best-Job-Interview.com helps you catapult to the front of the interview pack with an inside look at the sort of questions you can expect on the big day.Your potential next boss will want to know if you have the experience to hit the ground running and start making his or her office run smoothly and efficiently from day one. Expect to hear the following questions: â€Å"What were your primary responsibilities?,† â€Å"How many calls did you take on an average day in your last job?,† â€Å"What sort of people did you interact with on a daily basis?,† and â€Å"What sort of inquiries did you have to handle?†They’ll also want to know if your receptionist skills are top notch, so be ready for the following sorts of questions as well: â€Å"What are the most important skills for a receptionist?† and â€Å"What computer skills do you have?†Great receptionists can always think fast on their feet, multi-task like champs, and come up with effective strategies for handling any situation. Therefore, expect interview questions designed to task your on-the-job behavior and ability to think fast when it’s needed: â€Å"Tell me about a recent situation where you had to handle a difficult customer?,† â€Å"Describe how you organize your tasks for the day?,† â€Å"Tell me about a tough problem you had to sort out recently,† and â€Å"Can you give me an example of where you used your initiative in your previous job?†Beyond a great receptionist background and stellar skills, potential employers will want to know if they’re hiring someone with a motivated and positive work attitude and ethic. After all, receptionists are typically the face of the organizations they work for and have to work with every department and person in the office. Be prepared to hear the following questions on the day of your interview: â€Å"Why do you want to work as a receptionist for this company?† and â€Å"What do you like and dislike about working as a receptionist?†Now that you know the sort of questions you should expect when you’re on an interview you should invest some time leveraging your experience and skill set to craft the perfect responses to dazzle potential employers. Forewarned is forearmed!

Apple Computer, Inc. v. Microsoft Corporation Research Paper

Apple Computer, Inc. v. Microsoft Corporation - Research Paper Example Currently, Apple and Microsoft are world’s leading companies in the computer industry. Microsoft is headed by Bill Gates whereas Apple’s CEO is Steve Jobs. Many people believe that the competition between these two companies is actually the competition between these two charismatic leaders; Bill Gates and Steven Jobs. Microsoft succeeded in monopolising the operating system market in the world with the help of their renowned Windows based operating system. On the other hand Apple tried to conquer the global consumer electronics market with the help of diversified products. Apple faced many ups and downs in their history since its introduction. It faced stiff challenges in the 1990’s; however it was able to bounce back with the help of innovation and change management principles implemented in the organization during the latter periods of 1990’s and the at the beginning of the twenty-first century. On the other hand, Microsoft has not faced many challenges during their last 35 years of history. However, at present, Microsoft is facing several challenges from companies like Apple, Google etc. This paper compares the performances of Apple and Microsoft since their introduction. The first thing we all know is that during 1995-97, Apple lost control of the business market. IT managers needed something Apple wasn't able to supply: a capable back office system with authentication and management tools. Apple appeared to be ambivalent about this loss of the business market, and a series of poor CEOs failed to understand the evolution of business requirements and failed to bring clarity to Apple's vision (Martellaro, 2006) The battle for dominance between Apple and Microsoft was intensified in 1990’s. Apple introduced their Macintosh OS in response to Microsoft’s Windows in the 90’s. However, Apple failed to capture the market whereas Microsoft did succeed in monopolising the operating system market. Apple’s failure in providing the necessary solutions to the IT managers, opened many opportunities to Microsoft which they accepted with both hands. A series of windows based products like Windows 95, 98, 2000, XP, Vista etc entered the market which helped Microsoft to monopolize the operating system market. Microsoft did everything possible to sustain their monopoly in the operating system market. They have introduced many application software which are compatible only with the Windows operating system. For example, the MS Office package including software like MS word, MS excel, MS power point, MS access etc are compatible only with Windows operating system. Majority of the global computer users were badly in need of this application software and Microsoft was able to maintain their supremacy with the help of these software packages. Another business strategy successfully implemented by Microsoft was their meaningful collaboration with Microsoft chip manufacturers and other business associates. For example, Microsoft established business collaboration with Intel, one of the prominent microprocessor manufacture