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NCERT Comparison Sheet

Law vs How the ecosystem obeys it

Key differences, features, and comparative analysis of Law and How the ecosystem obeys it.

LawHow the ecosystem obeys it
First LawEnergy is neither created nor destroyed — the sun's energy is converted (fixed by autotrophs into food), not made. Flow is unidirectional: sun → producers → consumers.
Second LawEcosystems are not exempt. They need a constant supply of energy to synthesise the molecules they require, in order to counteract the universal tendency toward increasing disorderliness (entropy).

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