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Botany - Ecosystem

Practise 98 NEET previous year questions on Ecosystem, compiled from papers spanning 2002 to 2026. Each question is pulled directly from the actual exam paper it appeared in, so you're practising in the exact style and difficulty NEET tests.

Ecosystem has been asked in 23 of the 39 years of NEET papers analysed (1988–2026), with 98 questions in all. 43% of them were easy, 49% moderate and 8% tough. Most of its questions came from 2011, with 9 questions that year. In the last three years (2024–2026) it had 11 questions across 13 papers, about 0.8 per paper.

The chapter's 9 topics are not weighted equally: Functions of Ecosystem (41 questions, 42%), Structure of Ecosystem (16 questions, 16%), and Ecological Succession (13 questions, 13%) have been asked the most. Functions of Ecosystem has also led over the last five years, with 16 questions. Functions of Ecosystem has produced the most tough questions (3).

  1. 1Match List I with List II : List I List II A. Productivity I. Gross primary productivity minus respiration losses B. Net primary productivit2026 (Cancelled)Functions of Ecosystem
  2. 2Match List I with List II : List I List II A. Decomposition I. Accumulation of dark coloured amorphous colloidal substance B. Detritus II. R2026 (Cancelled)Functions of Ecosystem
  3. 3Ecological pyramids represent the relationship between the organisms at different trophic levels and they are generally inverted for :2026 (Cancelled)Functions of Ecosystem
  4. 4Which of the following are primary consumers in a food chain ?2026 (Re-NEET)Functions of Ecosystem
  5. 5Which of the following statements are correct ? (a) Energy flow from producers to consumers is unidirectional (b) Energy pyramid can never b2026 (Re-NEET)Functions of Ecosystem
  6. 6Given below are two statements: Statement I : The primary source of energy in an ecosystem is solar energy. Statement II : The rate of produ2025Functions of Ecosystem
  7. 7Which of the following is the unit of productivity of an Ecosystem?2025Functions of Ecosystem
  8. 8Given below are two statements: Statement I: In ecosystem, there is unidirectional flow of energy of sun from producers to consumers. Statem2025Functions of Ecosystem
  9. 9In an ecosystem if the Net Primary Productivity (NPP) of first trophic level is , what would be the GPP (Gross Primary Productivity) of the 2024Functions of Ecosystem
  10. 10Consider the pyramid of energy of an ecosystem given below: If is equivalent to 1000 J , what is the value at ?2024 (Re-NEET)Functions of Ecosystem
  11. 11Which one of the following is not a limitation of ecological pyramids?2024 (Re-NEET)Functions of Ecosystem
  12. 12In the equation GPP - R = NPP GPP is Gross Primary Productivity NPP is Net Primary Productivity R here is :2023 (All India)Functions of Ecosystem
  13. 13Identify the correct statement: A. Detrivores perform fragmentation. B. The humus is further degraded by some microbes during mineralisation2023 (All India)Functions of Ecosystem
  14. 14Match List-I with List-II. Choose the correct answer from the options given below :2023 (Manipur)Ecological Succession
  15. 15The amount of nutrients such as carbon, nitrogen, potassium and calcium present in the soil at any given time is referred to as :2023 (Manipur)Structure of Ecosystem
  16. 16Given below are two statements: Statement I : Decomposition is a process in which the detritus is degraded into simpler substances by microb2022 (Phase 1)Functions of Ecosystem
  17. 17Which one of the following will accelerate phosphorus cycle?2022 (Phase 1)Cycles Operating
  18. 18Detritivores breakdown detritus into smaller particles. This process is called:2022 (Phase 1)Functions of Ecosystem
  19. 19The pioneer species in a hydrarch succession are:2022 (Phase 2)Ecological Succession
  20. 20All successions irrespective of the habitat proceed to which type of climax community?2022 (Phase 2)Ecological Succession
  21. 21Match the List-I with List-II : Choose the correct answer from the options given below :2022 (Phase 2)Functions of Ecosystem
  22. 22The amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis is called:2022 (Phase 2)Components of Ecosystem
  23. 23The amount of nutrients, such as carbon, nitrogen, phosphorus and calcium present in the soil at any given time, is referred as:2021Functions of Ecosystem
  24. 24In the equation, GPP - R = NPP , R represents:2021Functions of Ecosystem
  25. 25Which of the following statements is not correct?2021Functions of Ecosystem
  26. 26In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct?2020 (Phase 1)Functions of Ecosystem
  27. 27Match the trophic levels with their correct species examples in grassland ecosystem. (a) Fourth trophic level (i) Crow (b) Second trophic le2020 (Phase 1)Functions of Ecosystem
  28. 28Which of the following statements is incorrect?2020 (Phase 2)Functions of Ecosystem
  29. 29Which of the following statements is incorrect regarding the phosphorus cycle?2020 (Phase 2)Cycles Operating
  30. 30The rate of decomposition is faster in the ecosystem due to following factors EXCEPT :2020 (Phase 2)Functions of Ecosystem
  31. 31Which of the following ecological pyramids is generally inverted?2019 (All India)Functions of Ecosystem
  32. 32What type of ecological pyramid would be obtained with following data? Secondary consumer : 120 g Primary consumer : 60 g Primary producer :2018Functions of Ecosystem
  33. 33Which of the following ecosystem has the maximum amount of biomass production?2017Introduction
  34. 34Presence of plants arranged into well-defined vertical layers depending on their height can be seen best in:2017Introduction
  35. 35Which one of the following is a characteristic feature of cropland ecosystem?2016 (Phase 1)Components of Ecosystem
  36. 36The term ecosystem was coined by:2016 (Phase 1)Introduction
  37. 37Select the pairs of sedimentary biogeochemical cycles. I. Hydrogen cycle and water cycle II. Phosphorus Cycle and sulphur cycle III. Calcium2016 (Phase 1)Cycles Operating
  38. 38Which of the following is correctly matched?2016 (Phase 2)On the Basis Development
  39. 39Vertical distribution of different species occupying different levels in a biotic community is known as:2015 (Phase 1)Structure of Ecosystem
  40. 40Secondary succession takes place on/in:2015 (Phase 1)Ecological Succession
  41. 41The mass of living material at a trophic level at a particular time is called:2015 (Phase 1)Structure of Ecosystem
  42. 42In an ecosystem the rate of production of organic matter during photosynthesis is termed as:2015 (Phase 1)Functions of Ecosystem
  43. 43During ecological succession:2015 (Phase 2)Ecological Succession
  44. 44Most animals that live in deep oceanic waters are:2015 (Phase 2)Components of Ecosystem
  45. 45In which of the following both pairs have correct combination?2015 (Phase 2)Cycles Operating
  46. 46An association of individuals of different species living in the same habitat and having functional interactions is:2015 (Phase 2)Components of Ecosystem
  47. 47Given below is a simplified model of phosphorus cycling in a terrestrial ecosystem with four blanks (A-D). Identify the blanks.2014Cycles Operating
  48. 48If 20J of energy is trapped at producer level, then how much energy will be available to peacock as food in the following chain? plant mice 2014Functions of Ecosystem
  49. 49Secondary productivity is rate of formation of new organic matter by2013 (All India)Functions of Ecosystem
  50. 50Natural reservoir of phosphorus is2013 (All India)Biomes

Frequently Asked Questions

1.How many questions are available for Ecosystem?

This chapter includes 98 questions compiled from NEET papers spanning 2002 to 2026.

2.Are these questions only from NEET, or from other exams too?

These are NEET questions specifically for the Ecosystem chapter. Questions from other exams like AIIMS or JIPMER are organised separately under their respective exam sections.

3.Is Ecosystem an important chapter for NEET Botany?

Ecosystem has appeared in 23 of the 25 years of NEET papers covered here, with 98 questions across 36 papers - about 3 per paper it appears in.

4.What is the difficulty level of Ecosystem questions in NEET?

Of the 98 questions analysed for this chapter, 43% are easy, 49% moderate and 8% tough. 2011 had the most, with 9 questions.

5.Which topics in Ecosystem should I focus on?

These topics have carried the most weightage in Ecosystem:

  • Functions of Ecosystem - 41 questions (42%)
  • Structure of Ecosystem - 16 questions (16%)
  • Ecological Succession - 13 questions (13%)
  • Functions of Ecosystem has produced the most tough questions (3).
6.Is Ecosystem's weightage in NEET going up or down?

Across all 36 papers analysed, Ecosystem has averaged about 2.7 questions per paper. In the last three years (2024–2026), that average has fallen, at about 0.8 questions per paper. Use the year-wise numbers on this page for the exact trend before you decide how much time to give it.