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1) Small fish and crustaceans are also used to kill the larvae of a. butterfly b. aphids c. mosquitos d. pupa
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2) The combination of atmospheric nitrogen with hydrogen under high temperature and pressure is classified as a. atmospheric oxygen fixation b. atmospheric nitrogen fixation c. industrial nitrogen fixation d. biological nitrogen fixation
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3) The conversion of gaseous nitrogen into the nitrates with the help of bacteria is classified as a. biological oxygen fixation b. atmospheric oxygen fixation c. atmospheric nitrogen fixation d. biological nitrogen fixation
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4) The process of denitrification returns nitrogen into the a. ecosystem b. atmosphere c. biosphere d. organism
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5) The atmospheric gaseous nitrogen is converted during lightning and thunderstorms into a. oxides of carbon b. oxides of oxygen c. oxides of nitrogen d. nitric acid
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6) Considering the ecological organizations, the range between tops of the highest mountains and floor of oceans is classified as a. biosphere b. exosphere c. troposphere d. stratosphere
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7) The interactions between the members of different species are called a. interspecific interactions b. competition c. intraspecific interactions d. predation
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8) The kind of parasitism in which the whole life of parasites are spent as parasites is called a. permanent parasitism b. temporary mutualism c. permanent mutualism d. temporary parasitism
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9) Ammonia is converted into nitrites by a. fungi b. virus c. algae d. bacteria
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10) Considering the following, the abiotic components of the ecosystem includes a. grass and b. birds and snakes c. basic elements and soil d. cattle and deer
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11) The process which converts the nitrogen gas into the nitrates is called a. carbon fixation b. nitrogen fixation c. oxygen fixation d. nitrate fixation
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12) The process in which there is the utilization of nitrates by organisms is called a. assimilation b. denitrification c. ammonification d. nitrification
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13) The representation of biomass energy present in different levels of the food chain is classified as a. food chain pyramid b. food web pyramid c. biomass pyramid d. ecological pyramid
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14) The coal burning in the air leads to a. oxygen and sulphur dioxide b. methane and nitrogen dioxide c. dust and nitrogen d. dust and smoke
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15) The representation of biomass for per unit area at various trophic levels graphically is classified as a. pyramid of numbers b. pyramid of primary consumers c. pyramid of biomass d. pyramid of decomposers
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16) Intergovernmental Panel on Climate Change (IPCC) was established in a. 1980 b. 1970 c. 1950 d. 1990
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17) Pakistan developed the National conservation strategy in a. 1990 b. 1991 c. 1993 d. 1992
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18) The constant flow of energy is from producer to a. consumer b. producer c. herbivores d. carnivores
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19) The process of nitrates utilization by organisms is classified as a. assimilation b. nitrification c. denitrification d. ammonification
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20) The law which states that energy is only transformed from one state into another and it is never destroyed nor created is called a. law of momentum b. law of nuclear fission c. law of kinematics d. law of thermodynamics
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