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NEET 2025, Biology Q18: Ecosystem

NEET2025Biology
Q.

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 2 law of thermodynamics.

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

  1. A

    Statement I is incorrect but statement II is correct

  2. B

    Both statement I and statement II are correct

  3. C

    Both statement I and statement II are incorrect

  4. D

    Statement I is correct but statement II is incorrect

Solution

Statement I: The sun is the ultimate energy source for almost every ecosystem on Earth, and this energy flows in one direction — sun producers consumers. So Statement I is correct.

Statement II: Ecosystems are not exempt from the second law of thermodynamics. They require a constant input of energy precisely because some energy is always lost as heat (entropy increase), in line with the second law. Statement II is incorrect.

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