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  • Given below are two statements: Statement I: In ecosystem, there is unidirectional flow of energy of sun from producers to consumers. Statement II: Ecosystems are exempted from 2nd law of thermodynamics. In the light of the above statements, choose the

Q.108) Given below are two statements:

Statement I: In ecosystem, there is unidirectional flow of energy of sun from producers to consumers.

Statement II: Ecosystems are exempted from 2nd law of thermodynamics.

In the light of the above statements, choose the most appropriate answer from the options given below:

A)  (1) Statement I is correct but statement II is incorrect

B)  (2) Both statement I and statement II are correct

C)  (3) Both statements I and II are incorrect

D)  (4) Statement I is correct, but Statement II is incorrect
 

Answers (1)

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Q.108) >

  • Statement I is correct: In an ecosystem, energy flows in a unidirectional manner, starting from the sun (the primary source of energy) to producers (plants), then to primary consumers (herbivores), and so on up the food chain to higher-order consumers (carnivores and omnivores). This flow of energy does not reverse, and it decreases as it moves up the trophic levels due to energy losses at each step.

  • Statement II is incorrect: According to the second law of thermodynamics, in any energy transfer, some energy is always lost as heat. This applies to ecosystems as well, where energy is degraded as it flows through the food chain, and not all energy is available for the next trophic level. Ecosystems cannot be exempt from this law, as some energy is always lost during metabolic processes.

        

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Parbin Huda Baruah

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