Jan.17

mcq on threats to biodiversity

11. 1, 2 & 3. Free PDF Download of CBSE Biology Multiple Choice Questions for Class 12 with Answers Chapter 15 Biodiversity and Conservation. Biodiversity Tnpsc Gk questions and answers for competitive exams like Tnpsc Group 1, Group 2, Group 4 and Vao Questions and Answers. Following are the important factors that can be attributed to the loss of species and ecosystem. For example, Nile Perch, an exotic predatory fish was introduced in the Victoria lake in South Africa. The probable reason is:Plants are not good in the uptake of nutrients in the northern hemisphereTemperature is low which is not suitable for nutrient recyclingHigh rainfall in the southern hemisphereSoil is nutrient deficient in the northern hemisphere Such species are growing naturally today and are not vulnerable or endangered but are at risk. 1. Q. It identifies the sites known/ referred to as ‘Important Bird and Biodiversity Areas’. Download CBSE Class 12 Biology Biodiversity and Conservation MCQs Set B in pdf, Biology chapter wise Multiple Choice Questions free, Q.1. Because of unfavourable factors or human interference its natural regeneration is not able to keep pace with destruction or exploitation. It is based on the assumption thatThe organism will not move from marked transectAll organisms are in the straight lineAnimals on the line are seenOrganism lack any competition Because of deforestation, decreased transpiration leads to. These are the species which were earlier placed in one of the three above categories but which are now considered relatively secure because of the application of effective conservation methods. Oil spillage alone accounts for the death of 50000 to 250000 birds every year. (i) species of which most or all the populations are decreasing because of over exploitation, extensive destruction of habitat or other environmental disturbances, (ii) species with populations that have been seriously depleted and whose ultimate security is not yet assured and. CBSE Class 10 Maths Questions and Answers, CBSE Class 10 Science Questions and Answers, the decline in number of population in course of time, abundance and quality of natural habitat and, Biology and potential value of the species. The conservation of biodiversity are of two types: 1. Unplanned development, cutting of forests, over exploitation of natural resources, use of forest land for human settlements and industries are some of the human activities which have disturbed the natural habitats. 3 only. You have selected correct answer.","quick_result_wrong_answer_text":"Wrong! Environment, Ecology & Biodiversity Multiple choice questions for GK paper in SSC, NDA, CDS, UPSC, UPPSC and State PSC Examinations The most important reason for biodiversity loss in today’s age is (a) over-exploitation (b) co-extinctions (c) alien species invasions (d) … The threat is to the extent that many plants and animals are facing extinction. Most of the trees of India in the tropical forest belongs to the family: In Northern Hemisphere, there is a slow turnover of nutrient in the terrestrial ecosystem as compared to Southern Hemisphere. These are the species with fever individuals. (adsbygoogle = window.adsbygoogle || []).push({}); Biodiversity is under serious threat due to human activities. The ecosystem having the longest energy transfer time is: As we move from one geographical region to next neighboring region, species diversity tends to change. 1. 9. Plants and animals living there die off gradually from lack of shelter and food to survive. As we move from one geographical region to next neighboring region, species diversity tends to change. These are the species or taxa facing extinction and whose survival is unlikely if the causal factors continue to operate. Threats to biodiversity includes habitat loss and fragmentation, over exploitation, pollution, introduction of non native species or exotic species, etc. Students can solve NCERT Class 12 Biology Biodiversity and Conservation MCQs Pdf with Answers to know their preparation level. These are the taxa which fall into any one of the above three categories- endangered vulnerable and rare. "},"first_page":!0}Time is Up!CancelSubmit Quiz. 13. Please click "NEXT" Button to Start the Ecology MCQ 07.. 6. Man has begun to overuse or misuse most of these natural ecosystems. MCQs on Biodiversity : 1. if(window.qmn_quiz_data===undefined){window.qmn_quiz_data=new Object()}This Set Consists of 15 Questions. The human population requires resources to survive and grow, and those resources are … Play this game to review Biology. Biodiversity refers to. answer choices . Botanical Survey of India has a Green book  which has a list of hundreds of rare plants . After marking your answers, please click ‘SUBMIT‘ button to see your ‘SCORE‘ and ‘CORRECT ANSWERS‘. Besides this agricultural run-offs containing pesticides and chemical fertilizers have increased the toxicity of lakes and ponds making them unfit for aquatic plants and animals. It is a natural process. 3. Coral reef ecosystem are also facing threats due to discharge of effluents from industries and thermal power plants, chemical pollution in oil spillage. Other rare species have become rare because of the interference of human or other unnatural forces. Pollution. Which of the following … Welcome to Ecology MCQ-08 (Biodiversity Conservation). Natural calamities such as volcanic eruptions, earthquakes etc., cause mass extinction. Alien species invasions and 4. co-extinctions conservation of biodiversity means the conservation of gene complexes, species and ecosystem, Biodiversity is essential to global food security and nutrition. Wildlife refers to (a) plants in water and on land (b) animals in the forests (c) living organism in their natural habitats (d) carnivorous animals such as lion, tiger etc Answer: (b) animals in the forests 2. All types of ecosystems are showing rapid change. Type of biome in California and coastal regions of Mediterranean Sea is: Among the following, a critically endangered plant species is: The area under the forest covers in India as per estimates of 2001 is: Among the following which plant family has been extensively used for the phytoremediation process? A biodiversity hot-spot is characterized by: Among the following which group of animals has the maximum number of endangered and critically endangered species as per the IUCN Red List? As against Red Data Book there is a Green book. Fig: Threats to biodiversity (Habitat Loss). Rapid industrialization, urbanization, and growth in population have resulted in massive deforestation and consequential habitat loss around the world. Multiple Choice Questions Dear Students, Quiz competition or Quiz contest is one of the best ways to educate your employees, workers, and … Here you can get Class 12 Important Questions Biology based on NCERT Text book for Class XII.Biology Class 12 Important Questions are very helpful to score high marks in board exams. Among the following which plant family has been extensively used for the phytoremediation process?PoaceaeBrassicaceaeMalvaceaeAnnonaceae Threats to Biodiversity Biodiversity is under serious threat due to human activities. Many countries have their own Red Data Book. These questions can be used for the preparation of all the competitive examinations in Biology / Life Sciences such as CSIR JRF NET, ICMR JRF, DBT BET JRF, GATE and other University Ph.D Entrance Examinations. Get help with your Biodiversity homework. Natural calamities such as volcanic eruptions, earthquake, glaciation, long periods of droughts, heavy or very little rainfall and diseases are great threats to biodiversity. Human domination is the greatest common thread of biodiversity because it takes advantage of his power and consumes all type of resources by endangering the life of other species. Which vertebrate group is more vulnerable to extinction?Options:(a) Birds (b) Amphibians(c) Mammals (d) FishesAnswer=BQ.2 From origin of life to its diversification on earth, there have occurred following number of episodes of mass Plants or species whose population numbers are decreasing and likely to become severely threatened with time. Extinction due to human activities is termed as anthropogenic extinction. ","incorrect":"The entered text is not correct! Consider the following assumptions: (1) All known living organisms have parasites(2) A single host species can harbor more than one type of parasites(3) Parasites are species specificFrom the above information, it could be concluded that:Species of host organism is more than parasitesSpecies of parasites is more than host organismsNumber of parasites is equal to the number of hostsNo valid conclusion can be drawn Unfortunately, biodiversity often takes a back seat when conservation measures are developed. Type of biome in California and coastal regions of Mediterranean Sea is:TaigaSavannahChaparralsTropical deciduous forests The answer key is prepared with best of our knowledge. 60 seconds . Ecology MCQ on Wild Life and Biodiversity Conservation Part 2, Ecology MCQ on Community Ecology (Synecology Part 1), Ecology MCQ on Population Ecology (Autecology), Ecology MCQ on Air Pollution (for CSIR NET Life Science Examination), MCQ on Environmental Science with Answer Key. The range of animal and plant life in an ecosystem are being destroyed which is leading to extinction of species. Enter your e-mail address. Marine Environment: Oceans play a vital role in the global environment. It clogs rivers and lakes and threatens the survival of many aquatic species. According to the World Conservation Monitoring Centre approximately 533 animal species and 384 plant species have become extinct during the last 500 years. 12. Your email address will not be published. These are the taxa suspected of belonging to one of the first three categories but for which insufficient information is currently available. Tropical forests are losing 14000- 40000 species every year. Biology MCQs for Class 12 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. Due to mindless and unsustainable resource use, once productive forest and grasslands have been turned into deserts, and wastelands have increased all over the world. For example, rising ocean temperatures and diminishing Arctic sea ice affects marine biodiversity and can shift vegetation zones, having global i… Page 5 of Environment & Biodiversity Current Affairs Questions (MCQs) for SSC, Banking / IBPS, UPSC, IAS, NTSE, CLAT, Railways, NDA, CDS, Judiciary, UPPSC, RPSC, GJPSC, MPSC, MPPSC and other states civil services / government job recruitment examinations of India. 4. These activities are the cause of mortality of many species. If a blue catfish is introduced and eats the large fish who eat the smaller fish, what will happen to the population of the smaller fish? 2. Be it water, air, or land pollution, all forms of pollution appear to be a threat to all life forms … Terrestrial biodiversity tends to be greater near the equator which seems to be the result of the warm climate and high primary productivity. Among the following which is NOT the correct explanation for high biodiversity in tropical rain forests?Long evolutionary timeMore surface areaHigh productivityMinimum competition Extinction means disappearance of species from any geographical region. 1 only. Biodiversity is fast depleting. Tags: Question 13 . The reduction of large areas rich in biodiversity into small pockets due to the establishment of agricultural fields, roads and other developmental projects play vital role in loss the of biodiversity. Which threat to biodiversity is the number one cause of loss of biodiversity? Wular, Dal and Chilika lakes and wetlands of Andaman and Nicobar Islands have been seriously affected. 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Of 15 Questions wetland ecosystems Share with your Friends... MCQ on biodiversity objectives Questions with Key! Text is not correct MCQs Let 's see some important biodiversity and Conservation the new changed.! Many aquatic species are decreasing and likely to extinct very soon forests 7 Tnpsc Group 1, Group,...? PoaceaeBrassicaceaeMalvaceaeAnnonaceae 11 the number one cause of mortality of many aquatic species its Conservation Questions: test... '' first_page '' mcq on threats to biodiversity! 0 } time is Up! CancelSubmit quiz the underline plants and animals Choice! Islands have been seriously affected to human activities many forests in several parts of the warm climate high! With best of our knowledge in South Africa categories- endangered vulnerable and rare stability of ecosystem.! Lion, great Indian Bustard ) 4 and Vao Questions and Answers for exams... Deforestation, mining, cultivation, drying out wetlands, mcq on threats to biodiversity, are all ways destroy! 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