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11. The accumulation of non-biodegradable substances in a food chain in increasing amount at each higher trophic level is known as (NTSE Delhi, Stage-I, 2014-15)
Accumulation
Eutrophication
Pollution
Bio-magnification
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12. _ is the pollutant released from air-conditioner. (NTSE Tamil Nadu, Stage-I, 2014-15)
Chlorofluorocarbons
Carbon dioxide
Methane
Carbon-monoxide
13. In a food chain comprising of a snake, grass, frog and insect, the secondary consumer is (NTSE Delhi, Stage-I, 2016-17)
Insect
Snake
Frog
Grass
14. The decomposers in an ecosystem convert (NTSE Delhi, Stage-I, 2015-16)
Inorganic substance into organic substance
Simpler substance into complex sUbstance
Solar energy into chemical energy
Organic sUbstance into inorganic substance
15. Which of the following is the example of the waste bio-decomposition of living beings? (NTSE Gujarat, Stage-I, 2015-16)
Vegetable
Glass
Plastic
Metal
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