Ecosystem NEET PYQs (1988–2026)

Solved Ecosystem PYQs

3 recent questions with answers. The full set of 104 is free to practise.

1. NEET 2026HardProductivity and decomposition
   Q1

   Match List I with List II:
   
   List I:
   
   A. Productivity,
   
   B. Net primary productivity,
   
   C. Gross primary productivity,
   
   D. Secondary productivity
   
   List II:
   
   I. Gross primary productivity minus respiration losses,
   
   II. Rate of formation of new organic matter by consumers,
   
   III. Rate of biomass production,
   
   IV. Rate of production of organic matter during photosynthesis
   
   Choose the correct answer from the options given below:

   • AA-III, B-I, C-IV, D-II
   • BA-I, B-II, C-III, D-IV
   • CA-I, B-III, C-IV, D-II
   • DA-III, B-I, C-II, D-IV

   Show answer & solution

   Correct answer: (A)

   Productivity -- rate of biomass production (III); NPP -- GPP -- respiration (I); GPP -- rate of photosynthesis (IV); Secondaryproductivity -- by consumers (II). So A-III, B-I, C-IV, D-II.
2. NEET 2026EasyEcological pyramids
   Q2

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

   • APyramid of number in grassland
   • BPyramid of energy in pond ecosystem
   • CPyramid of biomass in grassland
   • DPyramid of biomass in sea

   Show answer & solution

   Correct answer: (D)

   Pyramid of biomass in sea is inverted.
3. NEET 2026EasyEnergy flow and food chains
   Q3

   Which of the following are primary consumers in a food chain?

   • AParasites
   • BPredators
   • CHerbivores
   • DCarnivores

   Show answer & solution

   Correct answer: (C)

   Primary consumers are herbivores (they eat producers).

Topic-wise question count

Where NEET has asked from Ecosystem, most frequent first.

• Productivity and decomposition29
• Energy flow and food chains23
• Ecological pyramids14
• Ecosystem structure and components14
• Ecosystem services and succession12
• Nutrient cycling (carbon and nitrogen)11
• nergy flow and food chains1

Year-wise Ecosystem questions in NEET

Number of questions from this chapter in each year's paper(s).