MCQ Science and Technology Class 9 Chapter 7 Maharashtra Board Energy Flow in an Ecosystem 1. What is the term for the sequence of interactions between producers, consumers, and saprophytes in an ecosystem?Food webFood chainEnergy pyramidTrophic levelQuestion 1 of 202. Which organisms are directly dependent on autotrophs in a food chain?Primary consumersSecondary consumersApex consumersOmnivoresQuestion 2 of 203. Which of the following is an example of a secondary consumer?GrasshopperFrogTigerHumanQuestion 3 of 204. What is formed by the interconnection of many food chains in an ecosystem?Food chainFood webEnergy pyramidBio-geo-chemical cycleQuestion 4 of 205. Which type of consumer feeds on both herbivores and carnivores?Primary consumerSecondary consumerApex consumerOmnivoreQuestion 5 of 206. What is the term for the intricate network formed when an organism is prey for multiple consumers?Food chainTrophic levelFood webEnergy pyramidQuestion 6 of 207. Which organisms decompose the bodies of dead animals in an ecosystem?ProducersConsumersDecomposersOmnivoresQuestion 7 of 208. What is the step at which an organism obtains its food in a food chain called?Food webTrophic levelEnergy pyramidBio-geo-chemical cycleQuestion 8 of 209. Who first proposed the concept of the Ecological Pyramid in 1927?LindemanEltonWhittakerEichlerQuestion 9 of 2010. What happens to the amount of energy as it moves from producers to apex consumers?It increasesIt remains constantIt decreasesIt becomes trappedQuestion 10 of 2011. What is the pattern of energy exchange in an ecosystem called?Food webTrophic levelPyramid of energyBio-geo-chemical cycleQuestion 11 of 2012. What is the primary source of energy in any ecosystem?DecomposersSunConsumersNutrientsQuestion 12 of 2013. What happens to the energy of apex consumers after their death?It returns to the sunIt remains trappedIt is used by decomposersIt is lost completelyQuestion 13 of 2014. Why is the passage of energy in an ecosystem called ‘one way’ transport?Energy returns to the sunEnergy is recycled completelyNo energy returns to the sunEnergy is trapped in decomposersQuestion 14 of 2015. What do decomposers convert the remains of organisms into?Complex proteinsSimple carbon compoundsGaseous nitrogenFossil fuelsQuestion 15 of 2016. Which institute in Delhi is involved in research and training on ecology?Indian Institute of ScienceIndian Institute of Ecology and EnvironmentIndian Institute of TechnologyIndian Agricultural Research InstituteQuestion 16 of 2017. What is the cyclical flow of nutrients within an ecosystem called?Food chainEnergy pyramidBio-geo-chemical cycleTrophic levelQuestion 17 of 2018. Through which medium does the bio-geo-chemical cycle operate?Atmosphere onlyBiosphereHydrosphere onlyLithosphere onlyQuestion 18 of 2019. Which cycle is speedier compared to the sedimentation cycle?Gaseous cycleCarbon cycleNitrogen cycleOxygen cycleQuestion 19 of 2020. What is the main process by which plants convert carbon dioxide into carbohydrates?RespirationPhotosynthesisDecompositionCombustionQuestion 20 of 20 Loading...
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