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Environment Quiz Questions and answers in Hindi, CTET EVS, Grade 3 Environmental Studies, CTET Paryavaran, CTET EVS Question, CTET Environmental Studies Answer: Sonic booms produced by aircraft. 37) Which among the mammals on earth is the slowest in terms of their mobility? 59) In 1977, the scientists had made a fascinating discovery in ecosystems and that is the latest one. 50) The disintegration of dead animal and plant matter results in the formation of _____, 51) The gas layer which is a protective layer as well as unhealthy to Earth’s environment and life is _____. 101) Which term is commonly used for denoting all the living things including plants which are living under the water? Which was that? Top Ranking CBSE Sample Paper Books for 2021 Boards. Total organic matter present in an ecosystem is called : (A) Biome(B) Biomass(C) Biotic community(D) LitterThe correct answer is (B) Biomass6. 87) In New Zealand, one animal caused severe soil erosion in the countryside. 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