Show that the set of all even integers is infinitely countable.S.pdf

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Show that the set of all even integers is infinitely countable. Solution Let E be the set of even integers and f(x) = 2x be a function from N to E. 1 2 3 4 5 6 ….. 2 4 6 8 10 12 …… Then f is a bijection from N to E since f is both onetoone and onto. To show that it is injective, f(n) = f(m).Then 2n = 2m, and so n = m. To see that it is surjective, suppose that t is some even positive integer. Then t = 2k for some positive integer k and f(k) = t..

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Haploid. After is complete, the resulting gametes are haploid. This means there is 1 homolog present for each homologous pair. \"Keep in mind that, for better or for worse, we tend to focus largely on diploid organisms, like ourselves and fruit flies, in many biology courses. Not all organisms are diploid. The strawberries you buy at a grocery store are, for example, actually octaploids (8n). SIMULATING CELL DIVISION MEIOSIS WITHOUTRECOMBINATION Using the same 4 chromosomes you put together for the mitosis simulation, start with 4 unreplicated 4 chromosomes at G1 of interphase and simulate the events of meiosis. Beginning with the meiocyte, write out the chromosome numbers, just as you did for mitosis. G2: As you move the chromosomes through each phase of cell division in meiosis, describe to your lab partner all of the events that occur. Write out the chromosome numbers for each phase below. Solution G1: 4 unreplicated chromosomes (i.e, singlet chromosomes) S: 4 replicated chromosomes (i.e, doublet chromosomes) G2: 4 replicated chromosomes (i.e, doublet chromosomes) Prophase I : 4 replicated chromosomes (i.e, doublet chromosomes) Metaphase I :4 replicated chromosomes (i.e, doublet chromosomes) Anaphase I : 4 replicated chromosomes (i.e, doublet chromosomes) they are being separated at this stage. 2 replicated chromosomes move towards one end and other 2 replicated towards opposite end. Telophase I : 2 replicated chromosomes in each dividing cell. Interkinesis: 2 daughter cells are formed each consisting 2 replicated chromosomes. Prophase II : 2 replicated chromosomes in each of the two daughter cells. Metaphase II : 2 replicated chromosomes in each daughter cell arranged on metaphasic plate. Anaphase II : 2 singlet chromosomes would move toward one end of each daughter cell, other 2 singlet chromosomes towards the opposite end. Telophase II : 2 singlet chromosomes in each of the 4 dividing cells. cytokinesis: each of the 4 daughter cells would contain 2 singlet chromosomes..

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FTP and TFTP are primarily file transfer protocols. What is the main difference between both. Solution FTP stands for File Transfer Protocol. It is used to send/receive file from the remote computer. It is defined in RFC959. FTP establishes two connections between client system and server system, one for control information and the other for data to be transfered. Control information carry commands/response. Authentication need to be done initially by way of validating username and password. Once it is done files can be transferred between two systems. FTP handles both binary and text format files. When a FTP client requests to connect to the FTP server, a TCP connection is being established to the FTP server\'s port 21 reserved for FTP. After authentication is done, another TCP connection is being established for the actual data transfer on port number 20. TFTP stands for Trivial File Transfer Protocol. It is defined in RFC783. It is simpler than FTP, does file transfer between client and server process but does not provide user authentication and other useful features supported by FTP. TFTP uses UDP while FTP uses TCP. As TFTP is unreliable protocol due to UDP, it uses application layer recovery supported by UDP. This is done by embedding a small header between the UDP header and the data. This header incorporates codes for example read,write and acknowledgement along with numbering scheme which numbers 512 bytes of data. These block numbers provided are used to acknowledge the receipt and re-send the data in case of checksum failures. TFTP sends one block and waits on acknowledgement before sending another block. Key Differences Between FTP and TFTP:-.

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Given Starter File: import java.util.Arrays; /** * Encapsulates an integr array and provides methods * to manipulate it */ public class NumberArray { private int[] data; @Override public String toString() { return Arrays.toString(data); } } Tester File: NumberArrayTester.java Solve Using JAVA for an intro to java class Solution NumberArray.java import java.util.Arrays; /** * Encapsulates an integr array and provides methods * to manipulate it */ public class NumberArray { private int[] data; public NumberArray(int a[]){ data = a; } public void swap(int a, int b){ if(a >= 0 && b >= 0 && a<8 && b < 8){ int temp = data[a]; data[a] = data[b]; data[b] = temp; } } public int getLast(){ return data[data.length-1]; } public int product(){ int product = 0; if(data.length > 0){ product =1; } for(int i=0; i.

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DOES NOT NEED TO BE ANSWERED UNTIL NOV 13th Words Assignment Robert Glen Martin School for the Talented and Gifted, Dallas, TX Based on the Lab16c assignment from Stacey Armstrong © A+ Computer Science - www.apluscompsci.com Introduction The purpose of this assignment is to give students practice with Strings, arrays, and ArrayLists. It also provides the opportunity to work with several interacting classes. Overview This project utilizes three new classes: - Word- an immutable class representing a word - Words - a class representing a list of Word objects - WordTester- a class used to test the Word and Words classes. Starter Code The folder Words Student contains a JCreator project with starter code for the three classes. WordTester (the application) is complete and only requires uncommenting to test the Word and Words classes as they are completed. The needed imports, class headings, method headings, and block comments are provided for the remaining classes. Javadocs are also provided for the Word and Words classes. Word – This part of the lab has been done for you.Look at the main WordTester to see how it uses a Word object. Run the main to see the results of the tester code. The Word class represents a single word. It is immutable. You have been provided a skeleton for this class. Complete the Word class using the block comments, Javadocs, and the following instructions. 1. Add a String instance variable named word which will contain the word. 2. Complete the one parameter constructor to initialize the word instance variable. 3. Complete the getLength method to return the number of characters in the word. 4. Complete the getNumVowels method to return the number of vowels in the word. It should use the VOWELS class constant and String’s length, substring, and indexOf methods. Do not use more than one loop. Do not use any String methods that are not in the AP Subset. 5. Complete the getReverse method to return a Word with the letters of this reversed. 6. Complete the toString method to return the String word. 7. Uncomment the Word test code in WordTester and make sure that Word works correctly. Words The Words class represents a list of words. You have been provided a skeleton for this class. Complete the Words class using the block comments, Javadocs, and the following instructions. Step has been done for you. 1. Add a List instance variable named words which will contain the list of words. Be sure to specify the type of objects that will be stored in the List. Be sure that the instance variable is private. 2. Complete the one parameter constructor to initialize the words instance variable. You will need to create the ArrayList and add each word to it. Be sure to create a new Word object with each String in the parameter array wordList and then add it to the ArrayList words. This would be a great place to use a for-each loop. Your code should not generate any warnings. 3. Complete the countWordsWithNumChars method to return the number of wo.

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Discuss in detail how two different Progressive reformers tackled the social, political, or economic problems they felt most threatened America’s democracy and social order. What was their main object of reform? What actions did they take to implement that reform? How successful were they in their work? (Be sure to place each Progressive reformer’s work in the context of the industrial or urban problem with which he or she was most concerned, i.e. discuss/describe in some detail the social ill the reformer hoped to change and then also discuss, at length, the nature of that Progressive’s plan for reform). Solution Between 1890 and 1910 more than 12 million European people immigrated to the United states. They came from Ireland,Russia,Italy and other European countries and provided cheap Factory labour, a demand that was created with the country\'s expansion into the west following the Civil War. Many immigrants lived in Crowded and disease ridden tenments, Worked long Hours and lived in Poverty. Children often worked to help support the family. Jacob riis wrote How the other Half lives about the lives of immigrants on NewYork City\'s Lower East side to bring greater awareness of the immigrant\'s living conditions. The most famous settlement house in the United States in Chicago\'s Hull house founded by John Addams and Ellen gates starr in 1889 after Addams visited tonybee hall with in previous two years. Hull house though was not religious based organization. It focussed on providing Education and recretational fecilities for European immigrant woman and children. Lenox Hill neighbourhood house founded in 1894 Friendly inn settlement house founded in 1874 Henry Street settlement founded in 1893 Hirram house founded in 1896 and University settlement house founded in 1886 and the oldest in United States, were like Hull House important sites for social reform. United neighbourhood houses of NewYork is the federation of 35 settlement houses in NewYork city. These and other settlement houses inspired the establishment of settlement schools to serve isolated rural communities in Appalachia. By 1913 there were 413 settlements in 32 States. By the 1920\'s there were almost 500 settlement houses in the country. The Settlement house concept was continued by Dorodhy Day\'s Catholic worker Hospitality houses in 1930\'s. American settlement houses functioned on philosophy of scientific philanthropy a belief that instead of giving direct relief, charities should give resources to the poor so they could break out of the circle of poverty. American Charity workers feared that the deeply entrenched social class system in Europe would develop in United states..

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which of the following statements is an example of a phenocopy? A. Phenylketonuria results from a recessive mutation that causes light skin as well as metal retardation. B. Human height is influenced by genes at many different loci. C. Dwarf plants and motted leaves in tomatoes are caused by seperate genes that are linked. D. Vestigial wings in Drosophila are prodcued by a recessive mutation. This trait is also produced by high temperature during development E. Intelligence in humans is influenced by both genetic and environmental factors. Solution Answer is (D). D. Vestigial wings in Drosophila are prodcued by a recessive mutation. This trait is also produced by high temperature during development.

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what is a natural selection, genetic drift, and gene flow? would two small, geographically isolated populations in very different environments be likely to evolve in a similar way? explain. Solution natural selection is a process, by which organisam get better adaptation to enviroment for survival and produce more offespring . another defination is process by which the forms of organism in a population that are the best adapted to environment increase in frequency relatively to less adapted forms over a number of generations. this theory was given by Charles Darwin,natural selection is a comosite of all the force that cause differential survival & diffrential reproduction among the genetic variant.natural selection is nonrandom process by which biological traits become more or less common in population, there genetic drift-the random change in allele frequencies caused by sampling error across generations in final population is called genetic drift, drift can be major driving force for changing alleles frequencies in small population , however the key element of genetic drift is that which individuals survive and reproduce is random( unrelated to their phenotype and genotype). drift cause fixation of alleles in population. genetic drift is a random, directionaless process, it act to eliminate genetic variation over a time.drift lead in increase homozygosity for diploid organism and cause increase in inbreeding coefficient, and resulting in facilitate speciation(creating new species) Gene flow-gene flow is transfer of allele and genes from one population to another.through reproduction in same species.gene flow is also non as gene migration, geographically isolated populations in very different environments be likely to evolve in a similar way- speciation is a lineage splitting evolutionary process that produce two or more species, means creation of new and distinct biological species by branching off form ancestral population. occure when gene flow is reduce sufficiently between sister population, and this play critical role in speciation. mode of speciation are often classified as allopatric speciation and sympatric speciation allopatric speciation-geographical isolation between population, and increase genetic divergen by either genetic drift or selection, selection for increase reproduction isolation, and speciation completed. sympatric speciation-does not require geographical isoloation, this reproductive isolation depend on number of factor- like, competition for resources,disruptive selection,sexual selection.

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