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प्रश्न
Why is there stepwise decline of energy in a food chain?
लघु उत्तर
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उत्तर
Stepwise decline occurs because at every trophic level a large portion of energy is lost as heat during respiration, a part is not assimilated (passed as faeces) and a part remains unutilised; only about 10% is transferred to the next level.
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पाठ 18: Ecosystem - EXERCISES [पृष्ठ १०२५]
