WBCS MAINS 2014. কি রকম হতে চলেছে মেইন্স এর জেনারেল স্টাডিজ এর পেপার? একটি প্রাথমিক ধারনা পেতে আজ আমরা শুরু করতে চলেছি ১৫ টি প্রশ্নের একটি প্র্যাকটিস সেট। প্রশ্ন গুলি প্রয়োজনে টেক্সট বুকের সাহায্য নিয়ে অ্যানসার করো । তোমাদের প্রস্তুতি অনেকটাই একটা দিশা পাবে – আজকের বিষয় (ইকোলজি ও বায়োডাইভার্সিটি) PRACTICE SET -1 Q1. The formation of ozone hole in the Antarctic region has been a cause of concern. What could he the reason for the formation of this hole ? (a) Presence of prominent tropo-sphene turbulence; and inflow of chlorofluorocarbons. (b) Presence of prominent polar front and stratospheric clouds; and inflow of chlorofluorocarbons. (c ) Abscnce of polar front and stratospheric clouds; and inflow of methane and chlorofluorocarbons. (d) Increased temperature at polar region due to global warming. Q2. Two important rivers-one with its source in Jharkhand (and known by a different name in Odisha), and another, with its source in Odisha-merge at a place only a short distance from the coast of Bay of Bengal before flowing into the sea. This is an important site of wildlife and biodiversity and a protected area. Which one of the following could be this? (a) Bhitarkanika (b) Chandipur-on-sea (c) Gopalpur-on-sea (d) Simlipal Q3. Three of the following criteria have contributed to the recognition of Western Ghats , Sri Lanka and Indo Burma regions as hotspots of biodiversity : 1. Species richness 2.Vegetation density 3.Endemism 4.Ethno-botanical importance 5.Threat perception 6. Adaption of flora and fauna to warm and humid conditions Which three of the above are correct criteria in this context? (a) 1,2 and 6 (b) 2,4 and 6 (c) 1,3 and 5 (d) 3,4 and 6 Q4. The Himalayan range is very rich in species diversity. Which one among the following is the most appropriate reason for this phenomenon ? (a) It has a high rainfall that supports luxuriant vegetative growth (b) It is a confluence of different bio-geographical zones. (c)Exotic and invasive species have not been introduced in this region. (d) It has less human interference. Q5. Consider the following: I. Photosynthesis. 2. Respiration. 3. Decay of organic matter 4. Volcanic action. Which of the above add carbon dioxide to the carbon cycle on earth ? (a) 1 and 4 only (b) 2 and 3 only (c) 2, 3 and 4 only (d) I and 4 Q6. A sandy and saline area is the natural habitat of an Indian animal species. The animal has no predators in that area but its existence is threatened due to the destruction of its habitat. Which one of the following could be that animal ? (a) Indian wild buffalo (b) Indian wild ass (c) Indian wild boar (d) Indian gazelle Q7. Biodiversity forms the basis for human existence in the following ways: 1.Soil formation 2.Prevention of soil erosion 3.Recycling of waste 4.Pollination of crops Select the correct answer using the codes given below (a) 1,2 and 3 only (b) 2, 3 and 4 only (c) I and 4 only (d) 1, 2, 3 and 4 only Q8.Which one of the following is not a site for in-sim method of conservation of flora ? (a)Biosphere Reserve (b) Botanical Garden (c) National Park (d) Wildlife Sanctuary Q9. The 2004 Tsunami made people realize that mangroves can serve as a reliable safety hedge against coastal calamities. How do mangroves function as a safety hedge ? (a)The mangrove swamps separate the human settlements ^ from the sea by a wide zone in which people neither live nor venture out (b)The mangroves provide both food and medicines which people arc in need of after any natural disaster (c) The mangrove trees are tall with dense canopies and serve as an excellent shelter during a cyclone or tsunami (d)The mangrove trees do not get uprooted by storms and tides because of their extensive roots. Q10. The Red Data Books published by the International Union for Conservation of Nature and Natural resources (IUCN) contain lists of ? (a)Endemic plant and animal species present in the biodiversity hotspots. (b)Threatened plant and animal species. (c) Protected sites for conservation of nature and natural resources in various countries. Select the correct answer using the codes given below: (a) 1 and 3 (b) 2 only (c) 2 and 3 (d) 3 only Q11. Consider the following statements : 1. Biodiversity is normally greater in the lower latitudes as compared to the higher latitudes. 2 Along the mountain gradients, biodiversity is normally greater in the lower altitudes as compared to the higher altitudes. Which of the statements given above is/are correct? (a) 1 only (b) 2 only (c) Both 1 and 2 (d) Neither 1 nor 2 Q12. With reference to India, consider the following Central Acts : 1. Import and Export (Control) Act, 1947 2. Mining and Mineral Development (Regulation) Act, 1957 3. Customs Act, 1962 4. Indian Forest Act, 1927 Which of the above Acts have relevance on the biodiversity conservation in the country ? (a) 1 and 3 only (b) 2.3 and 4 only (c) 1,2,3 and 4 (d) None of the above Acts Q13. Biomass gasification is considered to be one of the sustainable solutions to the power crisis in India. In this context, which of the following statements is/are correct? 1.Coconut shells, groundnut shells and rice husk can be used in biomass gasification. 2.The combustible gases generated from biomass gasification consist of hydrogen and carbon dioxide only. 3.The combustible gases generated from biomass gasification can be used for direct heat generation but not in internal combustion engines. Select the correct answer using the codes given below : (a) 1 only (b) 2 and 3 only (c) 1 and 3 only (d) 1,2 and 3 Q14 The acidification of oceans is increasing. Why is this phenomenon a cause of concern? 1. The growth and survival of calcareous phytoplankton will be adversely affected. 2.The growth and survival of coral reefs will be adversely affected. 3.The survival of some animals that have phvtoplanktonic larvae will be adversely affected. 4.The cloud seeding and formation of clouds will be adversely affected. Which of the statements given above is /are correct? (a) 1,2 and 3 only (b) 2 only (c) 1 and 3 only (d) 1,2,3 and 4 Q15. 19. The increasing amount of carbon dioxide in the air is slowly raising the temperature of the atmosphere, because it absorbs 12012 -1J a.)the water vapour of the air and retains its heat (b)the ultraviolet part of the solar radiation (c) all the solar radiations (d) the infrared part of the solar radiation
Posted on: Wed, 22 Oct 2014 17:14:10 +0000
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