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NEET Botany Ecosystem 2025 NEET 2025

NEET Botany Question (2025) — Solution

Question

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:

Options

  1. A. Both statement I and statement II are correct
  2. B. Both statement I and statement II are incorrect
  3. C. Statement I is correct but statement II is incorrect
  4. D. Statement I is incorrect but statement II is correct

Answer

C. Statement I is correct but statement II is incorrect

Step-by-step solution

Sun is the only source of energy for all ecosystems on Earth, except for deep sea-hydro-thermal ecosystem. The energy flow is unidirectional from the sun to producers and then to consumers. Ecosystems are not exempted from the second law of thermodynamics. They need a constant supply of energy to synthesise the molecules they require to counteract the universal tendency towards increasing disorderliness.

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