MCQs: Above surface between 50 and 80 km the layer of decreasing temperature is called ______:
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MCQs: Which of the following terms is used for several individuals of a species living together in a locality?
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MCQs: Which of the following chemicals is responsible for the depletion of ozone layer in the atmosphere?
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MCQs: Light emitted by sun reaches earth in:
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MCQs: Uncontrolled industrialisation leads to acid rain. It is mainly contributed by:
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MCQs: The study of relation of animals and plants to their surroundings is called:
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MCQs: Nutrients are recycled in the atmosphere with the help of certain micro-organisms referred to:
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MCQs: Which of the following is biodegradable?
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MCQs: If all the plants of the World die, all the animals will also die due to shortage of:
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MCQs: The most dangerous consequence of excessive deforestation is:
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MCQs: Which amongst the following pairs of organisms represents predator - prey relationship?
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MCQs: The largest source of pollution in the world is:
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MCQs: "Green Hose Effect" means:
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MCQs: The maximum fixation of solar energy is done by:
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MCQs: Biodegradable wastes can usually be converted into useful substances with the help of:
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MCQs: Which of the following gases is not found free in air?
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MCQs: Nitrogen fixation is done by:
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MCQs: A microscopic organism playing a vital role in nitrogen cycle is:
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MCQs: Which of the following fuels causes minimum environmental pollution?
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MCQs: The crop most susceptible to frost is:
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