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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Q. An atom is surrounded by:

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Q. According to Nasa's data, researchers indicated that: world war 3 will be fought over

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Q. Vegetation- covered surfaces having:

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Q. Carbon dioxide is regarded as one of major:

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Q. Carbondioxide fertilisation affects C3 plants more than:

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Q. Phytoplanktons' are eaten by:

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Q. Low atmospheric pressure leads to natural disasters such as:

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Q. Celsius is a temperature scale, also known as:

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Q. At beginning of 21st century, there were about:

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