Q.7849·Miscellaneous·2018·Easy'Desertification' is a term used to explain a process of decline in the biological productivity of an ecosystem, leading to total loss of productivity. While this phenomenon is often linked to the arid, semi-arid and sub-humid ecosystems, even in the humid tropics, the impact could be most dramatic. Impoverishment of human-impacted terrestrial ecosystems may exhibit itself in a variety of ways : accelerated erosion as in the mountain regions of the country, salinization of land as in tht semi-arid and arid 'green revolution' areas of the country, e.g., Haryana and western Uttar Pradesh, and site quality decline—a common phenomenon due to general decline in tree cover and monotonous monoculture of rice/wheat across the Indian plains. A major consequence of deforestation is that it relates to adverse alterations in the hydrology and related soil and nutrient losses. The consequences of deforestation invariably arise out of site degradation through erosive losses. Tropical Asia, Africa and South America have the highest levels of erosion. The already high rates for the tropics are increasing at an alarming rate (e.g., through the major river systems—Ganga and Brahmaputra, in the Indian context), due to deforestation and ill-suited land management practices subsequent to forest clearing. In the mountain context, the declining moisture retention of the mountain soils, drying up of the underground springs and smaller rivers in the Himalayan region could be attributed to drastic changes in the forest cover. An indirect consequence is drastic alteration in the upland-lowland interaction, mediated through water. The current concern the tea planter of Assam has is about the damage to tea plantations due to frequent inundation along the flood-plains of Brahmaputra, and the damage to tea plantation and the consequent loss in tea productivity is due to rising level of the river bottom because of siltation and the changing course of the river system. The ultimate consequences of site desertification are soil degradation, alteration in available water and its quality, and the consequent decline in food, fodder and fuel-wood yields essential for the economic well-being of rural communities. Which of the following is/are the correct inference/ inferences that can be made from the passage? Deforestation can cause changes in the course of rivers. Salinization of land takes place due to human activities only. Intense monoculture practice in plains is a major reason for desertification in Tropical Asia, Africa and South America.View question
Q.7850·Miscellaneous·2018·EasyThe plan of an office block for six officers A, B, C, D, E and F is a follows : Both B and CV occupy office to the right of the corridor (a one enters the office block) and A occupies on the left ofthe corridor. E and F occupy office on opposite sides of the corridor but their offices do not face each other. The offices of C and D face each other. E does not have a corner office. F's office is further down the corridor than A's, but on the same side. Who is/are F's immediate neighbour/ neighbours?View question
Q.7851·Miscellaneous·2018·EasyThe plan of an office block for six officers A, B, C, D, E and F is a follows : Both B and CV occupy office to the right of the corridor (a one enters the office block) and A occupies on the left ofthe corridor. E and F occupy office on opposite sides of the corridor but their offices do not face each other. The offices of C and D face each other. E does not have a corner office. F's office is further down the corridor than A's, but on the same side. If E sits in his office and faces the corridor, whose office is to his left?View question
Q.7852·Miscellaneous·2018·EasyX and Y are natural numbers other than 1, and Y is greater than X. Which of the following represents the largest numberView question
Q.7855·Miscellaneous·2017·EasyA rainbow is produced due to which one of the following phenomena ?View question
Q.7856·Miscellaneous·2017·EasyGiven that the arithmetic mean and standard deviation of a sample of 15 observations are 24 and 0 respectively. Then which one of the following is the arithmetic mean of the smallest five observations in the data?View question
Q.7857·Miscellaneous·2017·EasyWhich one of the following can be considered as appropriate pair of values of regression coefficient of y on x and regression coefficient of x on y?View question
Q.7858·Miscellaneous·2017·EasyIn a binomial distribution, the mean is 2/3 and the variance is 5/9. What is the probability that X = 2?View question
Q.7859·Miscellaneous·2017·EasyThe probability that a ship safely reaches a port is 1/3. The probability that out of 5 ships, at least 4 ships would arrive safely isView question
Q.7860·Miscellaneous·2017·EasyWhat is the probability that at least two persons out of a group of three persons were born in the same month (disregard year)?View question
Q.7861·Miscellaneous·2017·EasyThe following table gives the monthly expenditure of two families: Items Family A Family B Food 3,500 2,700 Clothing 500 800 Rent 1,500 1,000 Education 2,000 1,800 Miscellaneous 2,500 1,800 In constructing a pie diagram to the above data, the radii of the circles are to be chosen by which one of the following ratios?View question
Q.7862·Miscellaneous·2017·EasyIf a variable takes values 0, 1, 2, 3, ..., n with frequencies 1, C(n, 1), C(n, 2), C(n, 3), ..., C(n, n) respectively, then the arithmetic mean isView question
Q.7863·Miscellaneous·2017·EasyIn a multiple-choice test, an examinee either knows the correct answer with probability p, or guesses with probability 1 – p. The probability of answering a question correctly is 1/m, if he or she merely guesses. If the examinee answers a question correctly, the probability that he or she really knows the answer isView question
Q.7864·Miscellaneous·2017·EasyConsider the following statements : 1. Variance is unaffected by change of origin and change of scale. 2. Coefficient of variance is independent of the unit of observations. Which of the statements given above is/are correct?View question
Q.7865·Miscellaneous·2017·EasyFive sticks of length 1, 3, 5, 7 and 9 feet are given. Three of these sticks are selected at random. What is the probability that the selected sticks can form a triangle?View question
Q.7866·Miscellaneous·2017·EasyConsider the following movements : 1.Moplah Rebellion 2.Bardoli Satyagraha 3.Champaran Satyagraha 4.Salt Satyagraha Which one of the following is the correct chronological order of the above in ascending order ?View question