Ecological pyramids represent the relationship between the organisms at different trophic levels and they are generally inverted for:

Pyramid of energy in pond ecosystem

Pyramid of biomass in grassland

Which of the following is the unit of productivity of an Ecosystem?

$\left(\mathrm{KCal} ~\mathrm{m}{ }^{-2}\right) \mathrm{yr}^{-1}$

$\mathrm{KCal} ~\mathrm{m}^{-3}$

$\mathrm{KCal} ~\mathrm{m}^{-2}$

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

Statement I is correct but statement II is incorrect

Statement I is incorrect but statement II is correct

Both statement I and statement II are correct

Both statement I and statement II are incorrect

Given below are two statements: Statement I: The primary source of energy in an ecosystem is solar energy. Statement II: The rate of production of organic matter during photosynthesis in an ecosystem is called net primary productivity (NPP). In the light of the above statements, choose the most appropriate answer from the options given below:

Statement I is correct but statement II is incorrect

Statement I is incorrect but statement II is correct

Both statement I and statement II are correct

Both statement I and statement II are incorrect

Which one of the following is not a limitation of ecological pyramids?

Saprophytes are not given any place in ecological pyramids

It assumes a simple food chain that almost never exists in nature

It does not take into account the same species belonging to two or more trophic levels

Ecosystem — NEET Previous Year Questions

38 solved PYQs · 2016–2026 · Biology

Solved PYQs: 38
Years covered: 2016–2026
Avg / year: ~3
Subject: Biology

How many NEET questions come from Ecosystem?

Ecosystem has contributed 38 questions to National Eligibility cum Entrance Test (UG) papers between 2016 and 2026 — an average of about 3 questions a year. That count is measured from EByAi’s bank of 46,150 NEET questions, not estimated from a syllabus. Every one of the 38 questions carries a written, step-by-step solution, and each is tagged to Ecosystem within Biology, so you can drill this chapter across every year at once instead of hunting through paper PDFs. Practising a chapter’s full PYQ history is the fastest way to learn the patterns examiners reuse.

Sample Ecosystem questions from real NEET papers

These are 5 real questions from the bank — exactly as asked, with the answer one tap away. All 38 Ecosystem questions (with full written solutions) are available in practice.

Question 1 · NEET 2026
Ecological pyramids represent the relationship between the organisms at different trophic levels and they are generally inverted for:
1. (A) $Pyramid of number in grassland$
2. (B) $Pyramid of energy in pond ecosystem$
3. (C) $Pyramid of biomass in grassland$
4. (D) $Pyramid of biomass in sea$
Show answerAnswer
$Answer: (D) Pyramid of biomass in sea$
Question 2 · NEET 2025
Which of the following is the unit of productivity of an Ecosystem?
1. (A) $KCal m^{- 3}$
2. (B) $(KCal m^{- 2}) yr^{- 1}$
3. (C) $gm^{- 2}$
4. (D) $KCal m^{- 2}$
Show answerAnswer
$Answer: (B) (KCal m^{- 2}) yr^{- 1}$
Question 3 · NEET 2025
Given below are two statements:

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

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

In the light of the above statements, choose the most appropriate answer from the options given below:
1. (A) $Statement I is correct but statement II is incorrect$
2. (B) $Statement I is incorrect but statement II is correct$
3. (C) $Both statement I and statement II are correct$
4. (D) $Both statement I and statement II are incorrect$
Show answerAnswer
$Answer: (A) Statement I is correct but statement II is incorrect$
Question 4 · NEET 2025
Given below are two statements:

Statement I: The primary source of energy in an ecosystem is solar energy.

Statement II: The rate of production of organic matter during photosynthesis in an ecosystem is called net primary productivity (NPP).

In the light of the above statements, choose the most appropriate answer from the options given below:
1. (A) $Statement I is correct but statement II is incorrect$
2. (B) $Statement I is incorrect but statement II is correct$
3. (C) $Both statement I and statement II are correct$
4. (D) $Both statement I and statement II are incorrect$
Show answerAnswer
$Answer: (A) Statement I is correct but statement II is incorrect$
Question 5 · NEET 2024
Which one of the following is not a limitation of ecological pyramids?
1. (A) $Saprophytes are not given any place in ecological pyramids$
2. (B) $It assumes a simple food chain that almost never exists in nature$
3. (C) $It accommodates a food web$
4. (D) $It does not take into account the same species belonging to two or more trophic levels$
Show answerAnswer
$Answer: (C) It accommodates a food web$

Ecosystem questions by year

Year	Questions	Share of chapter questions
2026	3
2025	4
2024	3
2023	7
2022	8
2021	3
2020	2
2019	2
2018	1
2017	1
2016	4

Practise these 38 questions with solutions

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FAQs

How many NEET questions have been asked from Ecosystem?

EByAi's bank holds 38 real NEET questions from Ecosystem, asked between 2016 and 2026 — about 3 per year on average. Every count is measured from actual papers, not estimated.

Is Ecosystem important for NEET?

38 questions over 11 papers make Ecosystem a steady-weightage chapter in NEET Biology. The year-wise table above shows exactly how often it appears.

Can I solve Ecosystem PYQs online for free?

Yes. EByAi lets you solve NEET past-year questions in the browser with written solutions — free daily practice, no card needed.

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