the classic field studies of Robert Paine that established the Keyst.pdf

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the classic field studies of Robert Paine that established the Keystone Species concept. This concept--the disproportional importance of one species in helping to maintain the biodiversity of the community--is dependent upon the presence of indirect and diffuse interactions among organisms. What are other keystone species that have been studied? What are the domino-effects of indirect/diffuse interactions that causes these species to be keystone? 100 words please Solution the role of keystone species in ecosystem is anologus to tthe keystone in arch.while the keystone is under least presure but without that keystone arch will collapse. in the same way an ecosystem will show drastic change if the key stone species is removed. even though it was a small part in the ecosystem in mass and bioproductivity. it became a popular concept in conservation biology. it has gots the hails of critics for over symplifying complex ecological systems. it also allows easy communication between ecologists and conservation polocy makers. a key stone generally means a small predator which stops the herbivore to eliminate pdominant plant species..

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Biodiversity in Motion .docx

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Biodiversity in Motion 1 Biodiversity in MotionAntoine CrowderJennifer Ott ENV 300 Environmental Biology July 27, 2014 In an ever changing world it benefits all to understand those changes affecting all areas of life in a rapidly expanding planet. Biodiversity is the variation that exists in the natural world at all levels of biological organization all organisms in a defined area, all of their variations and all of their interactions with each other and with the physical environment (Bandopadhyay, Yakoob, Sunny 2010). This paper shall explain Biological evolution, competition and ecological niches, food webs, geography, human population expansion and how humans can help conservationist with the many ecosystems in the world. The Measurement of Biodiversity is utilizes a variety of objective measures which have been established in order to empirically measure biodiversity Bandopadhyay, Yakoob, Sunny 2010). Each evaluation of biodiversity pertains to a particular use of the information. For practical conservationists, dimensions should consist of a quantification of principles that are commonly-shared among regionally impacted organisms, such as people. For others, a more financially defensible meaning should allow the guaranteeing of ongoing opportunities for both adaptation and future use by people, guaranteeing ecological durability. As a side impact, scientists claim that this evaluation is likely to be associated with the wide range of genetics. Since it cannot always be said which genetics are more likely to confirm valuable, the best option for conservationist is to guarantee the determination of as many genetics as possible. For ecologists, this latter strategy is sometimes regarded too limit as it prevents ecological sequence. Environmental Conservation Maintaining existing ecosystems benefits all life forms mainly because there is a clear relationship between the conservation of biological Diversity and the discovery of new biological resources. The relatively small number of developed plant species currently being cultivated have been largely researched and selected for breeding. But there are many other plants presently being ignored and under-utilized food crops which have the potential to become important crops in the future. Local tribes usually use the crops and have knowledge of the uses of wild plants which makes them a good source for ideas on developing new plant products. Plants and animals are vital and undoubtedly an important part of the cultural life of humans. Human cultures have thrived and evolved over time with their environment and biological diversity has proven to impart a distinctive cultural identity to different communities. Areas needing immediate intervention and protection for conservation of biodiversity are called Biodiversity Hot Spots. The IUCN and WWF are among ...

What is ecology

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Briefly describe three processing schema used in cochlear implants..pdf

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Briefly describe three processing schema used in cochlear implants. Solution ecology: It is a branch of biological science that deals with the relations of different organisms to one another and to their physical surroundings which can be varies species to species. It is a very much scientific approach to study the relationship between organism and the environment system. geography and earth science are equally important for ecology. example for how ecology is integrative across a suite of biological discipline: we can say that the biodiversity is the greatest example of ecology which is hugely connected with biological descipline. food pyramid, food chain,food web maintain the relationship between different species and also with ecosystem.Ecosystems is always sustaining life-supporting functions and produce natural things like biomass production which help to grow. wetland management is also another example. an example of the link between ecology and evolution Life history,Natural selection, adaptation, development, inheritance and populations are different type of example between the link of ecology and evolution. morphological, behaviorial study generally helping us to study evolution. taxonomy is also very important terms here. ecology and evolution inform conservation biology Firstle I can say that evolutionary biology is a necessary component for conservation or you can say conservation biology in terms of biomass or system and sorroundings. These are all the primary lenders behind long-term, sustainable biological collections, because we need to know what actually exists in order to better understand organism , species, geographical and earth and natural evolutionary history. Now The second most important key we can say that by understanding lots of different causes of diversification. And finally we know that evolution allows us for an better understanding of the potential responses to human disturbance like in population size..

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Effects of protease inhibitors in the treatment of secondary infecti.pdf

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Effects of protease inhibitors in the treatment of secondary infections in HIV-positive patients Find the average complication rate in the two groups of HIV-positive patients. Protease inhibitors (PIs) arc used in the treatment of infection by human immunodeficiency virus (HIV). A military hospital provides unlimited access to a full spectrum of HIV medications. Has this access reduced admissions caused by secondary infections? In particular, has unlimited access to PIs reduced the annual admission rate of patients with pulmonary complications? The number of admissions for HIV. separated into patients with and those without pulmonary complications, was obtained for the 4 years (1992-1995) before access to PIs and for the 2 years (1996-1997) after PIs became available. Solution The complication rate before PIs are available is: number of complications in the four years/total number of patients in those four years =194/485=0.4 The complication rate before PIs are available is: number of complications in the two years/total number of patients in those two years =25/92=0.27 Thus average complication rate is: (0.4+0.27)/2=0.335.

Determine whether the following pair of events are dependent of indep.pdf

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Describe the process (step by step) how a glucose molecule is absorb.pdf

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Describe the process (step by step) how a glucose molecule is absorbed from the lumen of the intestine to the blood. Include what energy drives this process. Then explain how researchers like Pia Roder were able to use radioactivity to determine where and how the transporters functioned. (The answer must be in a long paragraph form) Solution Carbohydrates initially undergo chemical digestion by salivary amylases result in formation of simple monomer sugars of \"glucose\" etc finally absorbed directly into the sublingual circulation. Later mixed food material enters into the pharynx from mouth due to the peristaltic movement of the visceral smooth muscles finally enters into the stomach Disaccharidases are the enzymes secreted from the brush border cells of intestine. These enzymes are sucrase, maltase, and lactase. These enzymes acts on disachraides such as maltose, sucrose and lactose and digests them into monomer sugar units of glucose & galactose. Simple, soluble and absorbable monomer glucose molecules \"diffused\" (diffusion) into the blood portals finally food chyme enters into the large intestine for reabsorption. It has clearly observed the \"sodium -glucose symport\" enable the transport of glucose monomers after digestion into the intestinal epithelial cells via microvilli (improve absorption) finally into the interstitial space followed by movement of glucose into the blood down the concentration gradient (crossing basilar membrane). Primary active transport using Na+-K+- ATPase improves movement sodium inside and potassium outside using energy followed by building up of interstitial sodium concentration. Sodium –glucose symport has considered as secondary active transport as it is a co-transporter. P V Roder analysis of \"glucose transporter functions\" via radioactivity principle: The sodium-glucose linked transporter (SGLTs, a co-transporter) uses the energy generated by the ATPase pump through the downhill sodium ion gradient for the glucose transportation across the apical membrane (against the glucose gradient). SGLTs are an example of secondary active transport. The glucose transporters (GLUT) present in the basolateral membrane now allow the glucose transport into the peritubular capillaries. Inhibition of the Na+/K+/ATPase fails to generate energy required for the SGLT secondary transporters, which inhibits glucose uptake. Sugars such as glucose, galactose and free amino acid (alanine) uptake into the microvilli epithelial cells is based on sodium mediated cotransport whereas fructose cannot be transported by sodium mediated transport during absorption after digestion. H+ mediated oligopeptide transport is present in gut epithelium. Scientist PV Roder has analyzed the function of SGLTs and GLUTs in the apical membrane using “radiotracer glucose gavage“, in which mice was taken of two different types such as “Sglt1 expressing wild type” and ” mice with sglt1-knockout” finally C14 radioactive tracing performed for the moveme.

Describe how rock fossils are formed.What are two different ways t.pdf

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Describe how rock fossils are formed. What are two different ways that geologists can use to age fossils? Solution 1). Permineralization or petrification is the most typical form of fossil formation. The soft tissues of the organism decays within the sediment, leaving behind the hard structures such as skeleton. Skeleton contains minerals, when water seeps into the skeleton, the minerals are dissolved in the water and form crystals within the spaces of remains. This crystallization process turns the skeleton remains into hard structures while encasing the sedimentary rock..

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You are working on an older PC and need to replace a faulty CPU. As you remove the CPU, you notice that the processor unit is a rectangular package with two uniformly spaced parallel rows of pins pointing downward. What general socket type takes this sort of chip? A. DIP B. LIF C. PGA D. ZIF Solution A. The DIP, or dual in-line package, is characterized by a chip with two rows of pins arranged in parallel, and this design can be found on a number of different electronic components, such as CPUs and other integrated circuits..

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write a short essay report to describe a topic of your interest related to the past, or current, or future technologies of cellular communications, bandwidths, antennas or their impact to the human society Solution past, or current, or future technologies of cellular communications: Mobile computing is to describe technologies thatenable people to access network services anyplace, anytime, and anywhere. past,present technologies of cellular communications: 1896 Guglielmo Marconi,First demonstration of wireless telegraphy.Based on long wave, requiring very large transmitters 1907 Commercial Trans-Atlantic Wireless Service.Huge ground stations: 30 x 100m antenna masts 1920 Discovery of short waves by Marconi.Cheaper, smaller, better quality transmitters by vacuum tube 1982 Start of GSM in Europe (1G analog) 1983 Start of AMPS in America (1G analog) 1992 Start of GSM (2G digital) 1997 Wireless LAN - IEEE802.11 1998 Iridium satellite system. 1999 Standardization of additional wireless LANs 2000 GSM with higher data rates (2.5G digital).HSCSD offers up to 57,6kbit/s.First GPRS trials with up to 50 kbit/s 2001 Start of 3G systems.IMT - 2000, several “members” of a “family”, CDMA2000 in Korea, UMTS tests in Europe. GPRS: General Packet Radio Service It is a mobile data service available to users of GSM mobile phones. It is often described as \"2.5G“. GPRS is packet-switched which means that multiple users share the same transmission channel, only transmitting when they have data to send. GPRS provides moderate speed data transfer, by allocating unused cell bandwidth to transmit data.Poor bit rate in busy cells.Usually, GPRS data is billed per kilobytes of information transceived. future technologies of cellular communications: Improved radio technology and antennas.smart antennas, beam forming, multiple-input multiple- output (MIMO) 802.11N.dynamic spectrum allocation.Core network convergence.IP-based, quality of service, mobile IP.Ad-hoc technologies.spontaneous communication, power saving, redundancy.Simple and open service platform.intelligence at the edge, not in the network (as with IN).more service providers, not network operators only. Impact on Society: Since the introduction of mobile phones, concerns (both scientific and public) have been raised about the potential health impacts from regular use.But by 2008, American mobile phones transmitted and received more text messages than phone calls.Numerous studies have reported no significant relationship between mobile phone use and health, but the effect of mobile phone usage on health continues to be an area of public concern. For example, at the request of some of their customers, Verizon created usage controls that meter service and can switch phones off, so that children could get some sleep.There have also been attempts to limit use by persons operating moving trains or automobiles, coaches when writing to potential players on their teams, and movie theater audiences. By one measure, near.

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Capital Budgeting Select a government agency (local/state/federal) and develop a four- to five- page APA-style paper summarizing the following: Explain how the debt capacity of the governmental entity is determined. Evaluate the effect of refunding or reorganizing existing debt obligations. Analyze various funding alternatives that can be used to support debt obligations. Your paper must be four to five pages (not including title and reference pages) and must be formatted according to APA style as outlined in the approved APA style guide. You must cite at least three scholarly sources in addition to the textbook. Solution The ability of any government entity to generate revenue from its economy underlie the government\'s debt capacity. GFOA (Government Finance Officers Association) determine its debt capacity through five steps methodology which includes the following: (1) defining the scope of analysis, (2) peer group development, (3)analysis of current position, (4) scenario analysis, and (5) financial policy development. Along with debts various other sources that could be used for funding includesales and use tax, property taxes, reserves etc..

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can anybody think of any world events that changed information systems? Solution Systems range from very simple to very complex. There are numerous types of systems. For example, there are biological systems, mechanical systems, human/mechanical systems, ecological systems, and social systems. Following are some technologies that will change technology:- - 3D printers, - sensor networks, - virtual humans technologies under development now will drastically change our world in the decade to come. Internet Things:- We have passed the threshold where more things are connected to the Internet than people. The transition to IPV6 also supports seemingly limitless connectivity. Sensor Network:- Nowadays this technology grows very fast by using this we can track song pollution, air pollution and we also can track temperature. This technology is growing day by day and many companies are coming with new ideas related to sensor networks. Not just Big data, but zettabyte :- About 5 exabytes of unique information were created in 2008. That\'s 1 billion DVDs. Fast forward three years and we are creating 1.2 zettabytes, with one zettabyte equal to 1,024 exabytes. \"This is the same as every person on Earth tweeting for 100 years or 125 million years of your favorite one-hour TV show,\" says Evans. Our love of high-definition video accounts for much of the increase. Yes, there are many other things too but I tried to tell you things I know..

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Biology research: I need help in finding out they specific topic on Genetics or cell biology to write a research paper. Could you give me some suggestions of specific topics to write about? Thank you! Biology research: I need help in finding out they specific topic on Genetics or cell biology to write a research paper. Could you give me some suggestions of specific topics to write about? Thank you! Thank you! Solution Specific topics on genetics : Features of inheritance Molecular basis for inheritance Gene expression Mutations Specific topics on Cell biology: Growth and development Techniques used to study cells Organelles.

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B. Please provide complete correct detailed solution. Thank you. Consider the distribution of individual incomes, yi in a population that is divided into two subgroups, indicated by the random variable D {0,1}. Assume: So mu 0, v 0 are the mean and variance of yi in group 0, and mu1, v1 are the mean and variance of y, in group 1. Suppose that P(D,i = 1) = p. Find mu = E[yi]> the overall mean of yi. Solution.

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3.35. Left-handedness. Left-handedness can be an inconvenience for a portion of the human population and is a study of interest to researchers throughout the world. About 6-10% of the human population exhibits left-handedness. Studies suggest that left-handedness is due to genetics rather than environmental causes. It is found to be more common in males (about 8- 12%) than females (about 5-9%), and also that the probability of left-handedness increases when a mother or father has it. The table (McManus, 1991; Table 4, page 262) provides empirical probabilities of a child being left-handed depending on gender and maternal/paternal handedness. Using these probabilities, answer parts (a-c) (a) Assume that parents are both right-handed. What is the probability that their child is right-handed? Probabilities of a son or daughter are assumed equal. (b) Ann is left-handed and expecting a son. No information about handedness of baby\'s father Ben is available, but it is known that Ben\'s parents are right-handed. What is the probability that the baby is going be left-handed. (c) Adam\'s parents are both right-handed. Adam\'s daughter Bethany and wife Claudia are both left-handed. What is the probability that Adam is right-handed. Does Claudia\'s handedness matter? Solution a) if the parents are both right handed Probability ther child ( can be son or daughter) is righ handed = (0.8951+0.9137) / 2 = 0.9044 b) ben could be left or right if ben is left with ann that is left probability will be (left) = 0.2940 if ben is right with ann that is left probabilty that the son will be (left) = 0.2150 PROBABILITY THAT THE BABY (SON) IS GOING TO BE LEFT-HANDED WILL BE = 0.2150+0.2940 = 0.509 c) probability that adam is right handed will be 0.8951.

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Write a generic method named genericListSort that takes a generic linked list with elements of type E and rearranges the nodes so that the elements stored in the list are sorted into the order of smallest to largest. Use the comparable to decide if an element of the list is larger, smaller or equal to another element. To enable the use of comparable, your generic Node class must implement Java\'s Comparable interface. The method listSort should be in a Java class called SortedGenericLinkedList as shown in the following. public class SortedGenericLinkedList { public Node genericListSort(Node head) { /* your implementation */} } Solution public class SortedGenericLinkedList { private static Node head; private static Node tail; public Node genericListSort(Node head) { Node tmp = head; while(true){ Node tmp1 = tmp.getNextRef(); while(tmp1!=null){ if(tmp.getValue()>tmp1.getValue()){ int temp=tmp.getValue(); tmp.getValue()=tmp1.getValue(); tmp1.getValue()=temp; } tmp1= tmp1.getNextRef(); } tmp = tmp.getNextRef(); } return head; } public void add(T element){ Node nd = new Node(); nd.setValue(element); System.out.println(\"Adding: \"+element); /** * check if the list is empty */ if(head == null){ //since there is only one element, both head and //tail points to the same object. head = nd; tail = nd; } else { //set current tail next link to new node tail.setNextRef(nd); //set tail as newly created node tail = nd; } } public void display(){ Node tmp = head; while(true){ if(tmp == null){ break; } System.out.println(tmp.getValue()); tmp = tmp.getNextRef(); } } public static void main(String a[]){ SortedGenericLinkedList sl = new SortedGenericLinkedList(); sl.add(32); sl.add(3); sl.add(54); sl.add(89); sl.display(); sl.genericListSort(head); sl.display(); } }.

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Why is it recommended that you use the broth (regardless of medium) with the most growth to serve as the \"standard\" for scoring a \"3\"? (3 for adundant growth) Why is it important to use the uninoculated controls for each medium to serve as the \"standard\" for scorinh a \"0\" in yheir respective tubes? (0 for no growth) Suppose afte performing this experiment, you examine the growth of two different organisms in Medium X. Both show growth and Organism 1 has produced less turnidity than organism 2. Explain how it could be possible that Organism 1\'s needs are actually better supplied by the medium than organism 2\', yet there is less turbidity? What is the biochemical basis for the spectrum of fastidousness seen in the mircobiol world? That is, why are some organism fastidious and others are nonfastidious? What are some consequences of leabing a stain on a bacterial smear too long? (over staining) What are some conswquences of not leabing a stain on a smear long enough? (under-staining) Consider a coccus and a rod of equal volume. Which is more likely to survive in a dry enviroment? Why? Which would be better adapeted to a moist enviroment? why? Solution 1. Broth with the maximum growth is used as a standard for measuring growth because broth helps in maintaining optimal concentration of bacteria. Broth results in uniform growth on solid media. Additionally growth can be measured with respect to turbidity either with the help of spectrophotometer or through visual examination of the broth. 2. Uninoculated medium serves as a negative control. It is used as an indicator for testing the sterility of the medium. In case any growth is present on uninoculated medium, it is an indicator of contanimation. 3. There might be various reasons for less turbidity shown by organism 1. Optimum temperature might not be maintained for Organism 1, which leads to slower growth. The growth rate of organism 1 may be less than organism 2. It might also be possible that there is production of inhibitory substances by organism 2 which are interfering with the growth of organism 1. 4. Some microorganisms are fastidious as they lack the metabolic pathways required to syntheisze certain nutrients. Therefore they rely on particular media for fulfilling their complex nutritional reqirements. 5. Overstaining a bacterial smear will cause cell wall disruption as a result of which the cell looses its true morphological characteristics. 6. Understaining will cause false Gram negative results. In case of simple staining understaining will cause difficulty in observing the cells. 7. Cocci are more likely to survive in a dry environment because they have a lower surface area to volume ratio which causes them to dehydrate slowly. 8. Rods are more likely to survive in a moist environment because they have a larfer surface area to volume ratio due to which they can easily exchange materials with their surroundings..

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What sources could be used to evaluate the performance of people working in the following jobs? Sales representative, TV reporter, Director of Nursing in a hospital, HR manager, and an Air Traffic Controller Solution Evaluation can be made of the followin jobs in the below mentioned ways Sales representative: The representatives should be evaluated on how well they are able to deal with the consumers and their ability to close the deal. The whole process should be evaluated under which the sales representative is working, rather than just evaluating the results or the targets. The representatives should be evaluated on team work, coordination and cooperative behaviour with the employees and with the customers. TV Reporter : The reporter can be evaluated on the basis of initiative taking ability and single handedly effectively and efficiently dealing with the news without any biasedness towards any section. The coopration with other employees is also considered as an important factor for evaluating performance of the journalist. The flexibility to work any time and any any place is also considered important keeping in mind the nature of work invoved in TV reporting. Communication also gives the journalist and important profile. The TV reporter should have the ability to communicate clearly in a concise manner. Director of Nursing in a hospital: The nursing director will be evaluated on the basis of handling day to day activities of the nursing care. The ability to motivate nurses towards efficiency in work by guiding them towards work as a humane job. Nursing director is also evaluated on the basis of flexibility to work any shift, be it in odd hours. Communication with the nurses and the patients is also considered important while evaluating the performance. HR Manager: The performance of HR manager will be on the basis of HR relations with whole of the employees of the organization. The existent culture in the organization. The overall performance of the organization. The attrition rate and ability to support and retain employees. The motivation of the employees of the organization and the performance of the newly hired employees. Air Traffic Controller: The communication ability to different language speaking pilots and crew of varoius airlines. Flexibility is utmost important for evaluating the performance of ATC. Knowledge of various aircrafts and problem resolving abilities..

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What is the term that describes the process in which nutrients pass through the wall of the gastrointestinal tract? Digestion Absorption Elimination Segmentation Solution THE TERM THATDESCRIBES THE PROCESS WHERE NUTRIENTS PASS THROUGH THE WALL OF THE GASTROINTESTINAL TRACT? ANS- ABSORPTION Nutrients paas through the wall of the intestine and reach the blood/lymph stream through the process absorption..

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2. The old human telephone “switches” were quaint but very slow. You would signal the operator and say you wanted to speak to Jill, but the operator knowing that Jill was visiting Sally, would connect you there. Other than slowness and inefficiency, name two disadvantages of this scheme. Solution The disadvantage of old telephone switching schene are like the absence of end to end encryption which discloses the message directly if man in the middle like attacks are done .. moreover it also causes time delay...there is no confidentiality of user call log because he has to inform the human operator.

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