Ecosystem PYQs Set 3 (PDF)

Set 3 of 8 · Questions 61-90 of 211

In the print window choose “Save as PDF”. The file prints without a web address or date line.

Mere Teacher · Previous Year Questions NEET Biology · Ecosystem · Set 3 (Q61-90)
Scan or visit mereteacher.com for free PYQ practice, timed CBT tests, step-by-step solutions and BroBot AI. Answers and solutions are free with a sign-up.
61. $A lake which is rich in organic waste may result in:-$ (1) $Increased population of fish due to lots of nutrients.$ (2) $Mortality of fish due to lack of oxygen$ (3) $Increased population of aquatic organisms due to minerals$ (4) $Drying of the lake due to algal bloom$ 62. $The region of Biosphere Reserve which is legally protected and where no human activity is allowed is known as:$ (1) $Buffer zone$ (2) $Transition zone$ (3) $Restoration zone$ (4) $Core zone$ 63. $Which one of the following is most appropriately defined?$ (1) $Amensalism is a relationship in which one species is benefited where as the other is unaffected.$ (2) $Predator is an organism that catches and kills other organism for food.$ (3) $Parasite is an organism which always lives inside the body of other organism and may kill it.$ (4) $Host is an organism which provides food to another organism$ 64. $The rate of formation of new organic matter by rabbit in a grassland is called$ (1) $Secondary productivity$ (2) $Net primary productivity$ (3) $Gross primary productivity$ (4) $Net productivity$ 65. $According to Central Pollution Control Board (CPCB), which particulate size in diameter (in micrometers) of the air pollutants is responsible for greatest harm to human health?$ (1) $1.0 or less$ (2) $5.2 - 2.5$ (3) $2.5 or less$ (4) $1.5 or less$ 66. $Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and municipal waste waters into natural surface waters, is$ (1) $< 100 ppm$ (2) $< 30 ppm$ (3) $< 3.0 ppm$ (4) $< 10 ppm$ 67. $Species Area relationship is described by the following equation. log S=log C+Z log A where Z is :$ (1) $Species richness$ (2) $Slope of the line$ (3) $Y-intercept$ (4) $Area$ 68. $If 20 J of energy is trapped at producer level, then how much energy will be available to peacock as food in the following chain ? plant \to mice \to snake \to peacock$ (1) $0.02 J$ (2) $0.002 J$ (3) $0.2 J$ (4) $0.0002 J$ 69. $In which of the following interactions both partners are adversely affected?$ (1) $Mutualism$ (2) $Competition$ (3) $Predation$ (4) $Parasitism$ 70. $About 70% of total global carbon is found in :-$ (1) $Oceans$ (2) $Forests$ (3) $Grassland$ (4) $Artificial ecosystem$ 71. $The device which can remove particulate matter present in the exhaust from a thermal power plant is:$ (1) $Incinerator$ (2) $Electrostatic Precipitator$ (3) $Catalytic Convertor$ (4) $STP$ 72. $Joint Forest Management Concept was introduced in India during :$ (1) $1960 s$ (2) $1970 s$ (3) $1980 s$ (4) $1990 s$ 73. $Just as a person moving from Delhi to Shimla to escape the heat for the duration of hot summer, thousands of migratory birds from Siberia and other extremely cold northern regions move to :-$ (1) $Western Ghat$ (2) $Meghalaya$ (3) $Corbett National Park$ (4) $Keolado National Park$ 74. $Which of the following statements is correct for secondary succession?$ (1) $It occurs on a deforested site$ (2) $It follows primary succession$ (3) $It is similar to primary succession except that it has a relatively fast pace$ (4) $It begins on a bare rock$ 75. $The principle of competitive exclusion was stated by :-$ (1) $MacArthur$ (2) $Verhulst and Pearl$ (3) $C. Darwin$ (4) $G.F. Gause$ 76. $When domestic sewage mixes with river water :-$ (1) $The increased microbial activity releases micro-nutrients such as iron.$ (2) $The increased microbial activity uses up dissolved oxygen.$ (3) $The river water is still suitable for drinking as impurities are only about 0.1%$ (4) $Small animals like rats will die after drinking river water.$ 77. $Which one of the following is a wrong statement?$ (1) $Greenhouse effect is a natural phenomenon$ (2) $Eutrophication is a natural phenomenon in freshwater bodies$ (3) $Most of the forests have been lost intropical areas$ (4) $Ozone in upper part of atmosphere is harmful to animals$ 78. $Which of the following protocols did aim for reducing emission of chloroflurocarbons into the atmosphere?$ (1) $Montreal protocol$ (2) $Kyoto protocol$ (3) $Gothenburg Protocol$ (4) $Geneva Protocol$ 79. $Which one of the following processes during decomposition is correctly described ?$ (1) $Leaching - Water soluble inorganic nutrients rise to the top layers of soil$ (2) $Fragmentation - Carried out by organisms such as earthworm$ (3) $Humification - Leads to the accumulation of a dark coloured substance humus which undergoes microbial action at a very fast rate$ (4) $Catabolism - Last step in the decomposition under fully anaerobic condition$ 80. $The Air Prevention and Control of Pollution Act came into force in :$ (1) $1990$ (2) $1975$ (3) $1981$ (4) $1985$ 81. $Alexander Von Humbolt described for the first time:$ (1) $Laws of limiting factor$ (2) $Species area relationships$ (3) $Population Growth equation$ (4) $Ecological Biodiversity$ 82. $Loss of biodiversity in a region may lead to$ (1) $Decline in plant production$ (2) $Lowered resistance to drought$ (3) $Increased variability in disease cycles$ (4) $All of the above$ 83. $In which of the following both pairs have correct combination :-$ (1) $In situ conservation : Cryopreservation Ex situ conservation : Wildlife Sanctuary$ (2) $In situ conservation : Seed Bank Ex situ conservation : National Park$ (3) $In situ conservation : Tissue culture Ex situ conservation : Sacred groves$ (4) $In situ conservation : National Park Ex situ conservation : Botanical Garden$ 84. $The increase in concentration of the toxicant at successive trophic levels is referred to as:$ (1) $Eutrophication$ (2) $Bioremediation$ (3) $Biotransformation$ (4) $Biomagnification$ 85. $Acid rain is caused by increase in the atmospheric concentration of :$ (1) $O_{3} and dust$ (2) $S O_{2} and N O_{2}$ (3) $S O_{3} and CO$ (4) $C O_{2} and CO$ 86. $A species facing extremely high risk of extinction in the immediate future is called :-$ (1) $Vulnerable$ (2) $Endemic$ (3) $Critically Endangered$ (4) $Extinct$ 87. $The breakdown of detritus into smaller particles by earthworm is a process called :$ (1) $Catabolism$ (2) $Humification$ (3) $Fragmentation$ (4) $Mineralisation$ 88. $Which one of the following statements for pyramid of energy is incorrect, whereas the remaining three are correct?$ (1) $It shows energy content of different trophic level organisms$ (2) $It is inverted in shape$ (3) $It is upright in shape$ (4) $Its base is broad$ 89. $In an ecosystem the rate of production of organic matter during photosynthesis is termed as:$ (1) $Gross primary productivity$ (2) $Secondary productivity$ (3) $Net productivity$ (4) $Net primary productivity$ 90. $Biochemical Oxygen Demand (BOD) may not be a good index for pollution for water bodies receiving effluents from :-$ (1) $Petroleum industry$ (2) $Sugar industry$ (3) $Domestic sewage$ (4) $Dairy industry$