Class NEET 2026 ALL Q #2077
COMPETENCY BASED
APPLY
4 Marks 2026 NTA-RE-NEET-2026 MCQ SINGLE
Which of the following statements are Correct?
(a) Energy flow from producers to consumers is unidirectional
(b) Energy pyramid can never be inverted
(c) Transfer of energy follows the 1% law
Choose the correct answer from the options given below :
(A) (b) and (c) only
(B) (a), (b) and (c)
(C) (a) and (b) only
(D) (a) and (c) only
Correct Answer: C

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Detailed Solution

Step 1: Analyze Statement (a)

In an ecosystem, energy enters from the sun and is captured by producers. As it moves through trophic levels (producers to consumers), it is dissipated as heat at each step. Therefore, energy flow is strictly unidirectional. Statement (a) is Correct.

Step 2: Analyze Statement (b)

The energy pyramid represents the amount of energy at each trophic level. Since energy is lost at each transfer, the amount of energy available at higher trophic levels is always less than at lower levels. Thus, the energy pyramid is always upright and can never be inverted. Statement (b) is Correct.

Step 3: Analyze Statement (c)

The transfer of energy between trophic levels follows the 10% Law (Lindeman's Law), which states that only about 10% of the energy is transferred to the next trophic level. The 1% law refers to the amount of solar energy captured by green plants (producers). Statement (c) is Incorrect.

Final Answer: (C) (a) and (b) only

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Pedagogical Audit
Bloom's Analysis: This is an APPLY question because the student must apply their understanding of ecological principles and laws of thermodynamics to evaluate the validity of specific biological statements.
Knowledge Dimension: CONCEPTUAL
Justification: The question tests the student's grasp of fundamental ecological concepts like energy flow, trophic dynamics, and energy transfer laws rather than rote memorization of isolated facts.
Syllabus Audit: In the context of NEET, this is classified as COMPETENCY. This question aligns with the NCERT Biology curriculum (Ecosystem chapter), requiring the student to distinguish between common misconceptions (1% vs 10% law) and core ecological principles.