Q. Where does a peak biological activity occur in spring?

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Q. Small animals in ocean are known as:

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Q. Each year, carbon dioxide is increasing approximately:

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Q. Small plants in ocean are known as:

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Q. Land and ocean reservoirs, much larger than amount in the

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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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