Q. About 90% of fossil fuel burning occurs in the

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Q. During winter, nutrient-rich water is transferred from deep water to the

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Q. Surface layers of water play a large part in the

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Q. 12C isotop forms an ordinary oxygen, approximately

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Q. IPCC' stands for

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Q. Both respiration and photosynthesis occur in the

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Q. Some planktons decomposes back into water column, releasing

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Q. 13C isotope of carbon having

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Q. What indicates of fossil fuel being burnt?

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Q. Atmospheric concentration of CO₂ has increased about

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Q. Three isotopes of carbon are important in:

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Q. Living organisms through photosynthesis takes up CO₂ from atmosphere, building up

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Q. About 10 kg of 14C is produced in atmosphere each year by action particle radiation of

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Q. Isotopes are chemically identical forms of same element, but, having different

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Q. Herbivorous zooplankton depends on

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Q. Carnivorous zooplankton eat herbivorous

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Q. Anthropogenic effects are "human caused" such as:

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Q. In carbon cycle, exchanging of carbon in different chemical forms occurred in

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Q. Snow covered surfaces, having

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Q. Biome is a distinctive ecological system characterised by nature of its:

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