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Q. No.Match List-I with List-II:
Choose the correct answer from the options given below.
| List-I | List-II | ||
| A. | Productivity | I. | Cross primary productivity minus respiration losses |
| B. | Net primary productivity | II. | Rate of formation of new organic matter by consumers |
| C. | Cross primary productivity | III. | Rate of biomass production |
| D. | Secondary productivity | IV. | Rate of production of organic matter during photosynthesis |
Choose the correct answer from the options given below.
| 1. | A-I, B-II, C-III, D-IV |
| 2. | A-III, B-I C-IV D-II |
| 3. | A-III, B-I, C-II, D-IV |
| 4. | A-I, B-III, C-IV, D-II |
Subtopic: Ecosystem Productivity |
79%
Level 2: 60%+
NEET - 2026
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Match List-I and List-II:
Choose the correct answer from the options given below:
| List-I | List-II | ||
| A. | Decomposition | I. | Accumulation of dark coloured amorphous colloidal substance |
| B. | Detritus | II. | Release of inorgainc nutrients by the acitivity of microbes in soil |
| C. | Mineralisation | III. | Breaking down of complex organic matter into inorganic substances |
| D. | Humification | IV. | Dead remains of plants and animals including fecal matter |
Choose the correct answer from the options given below:
| 1. | A-I, B-II, C-III, D-IV |
| 2. | A-IV, B-III, C-I, D-II |
| 3. | A-III, B-IV, C-II, D-I |
| 4. | A-III, B-II, C-I, D-IV |
Subtopic: Decomposition |
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Level 1: 80%+
NEET - 2026
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Ecological pyramids represent the relationship between the organisms at different trophic levels and they are generally inverted for:
| 1. | Pyramid of energy in pond ecosystem |
| 2. | Pyramid of biomass in sea |
| 3. | Pyramid of number in grassland |
| 4. | Pyramid of biomass in grassland |
Subtopic: Ecological Pyramids |
78%
Level 2: 60%+
NEET - 2026
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Which of the following are primary consumers in a food chain ?
1. Carnivores
2. Parasites
3. Predators
4. Herbivores
1. Carnivores
2. Parasites
3. Predators
4. Herbivores
Subtopic: Energy Flow |
96%
Level 1: 80%+
NEET - 2026
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Which of the following statements are correct?
Choose the correct answer from the options given below:
1. (b) and (c) only
2. (a), (b) and (c)
3. (a) and (b) only
4. (a) and (c) only
| (a) | Energy flow from producers to consumers is unidirectional |
| (b) | Energy pyramid can never be inverted |
| (c) | Transfer of energy follows the 1% law |
1. (b) and (c) only
2. (a), (b) and (c)
3. (a) and (b) only
4. (a) and (c) only
Subtopic: Energy Flow | Ecological Pyramids |
89%
Level 1: 80%+
NEET - 2026
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Given below are two statements:
In the light of the above statements, choose the most appropriate answer from this options given below.
| Statement I: | The primary source of energy in an ecosystem is solar energy. |
| Statement II: | The rate of production of organic matter photosynthesis in an ecosystem is called net primary productivity (NPP). |
| 1. | Statement I is correct but statement II is incorrect |
| 2. | Statement I is incorrect but statement II is correct |
| 3. | Both statement I and statement II are correct |
| 4. | Both statement I and statement II are incorrect |
Subtopic: Ecosystem Productivity | Energy Flow |
65%
Level 2: 60%+
NEET - 2025
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Who is known as the father of Ecology in India?
1. Ram Udar
2. Birbal Sahni
3. S. R. Kashyap
4. Ramdeo Misra
1. Ram Udar
2. Birbal Sahni
3. S. R. Kashyap
4. Ramdeo Misra
Subtopic: Introduction |
83%
Level 1: 80%+
NEET - 2025
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Given below are two statements:
In the light of the above statements, choose the most appropriate answer from the options given below:
| Statement I: | In an 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:
| 1. | Statement I is correct but statement II is incorrect |
| 2. | Statement I is incorrect but statement II is correct |
| 3. | Both statement I and statement II are correct |
| 4. | Both statement I and statement II are incorrect |
Subtopic: Energy Flow |
61%
Level 2: 60%+
NEET - 2025
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Which of the following is the unit of productivity of an ecosystem?
1. \(\mathrm{KCal} \mathrm{~m}^{-3} \)
2. \(\left(\mathrm{KCal} \mathrm{~m}^{-2}\right) \mathrm{yr}^{-1} \)
3. \(\mathrm{gm}^{-2}\)
4. \(\mathrm{KCal} \mathrm{~m}^{-2}\)
1. \(\mathrm{KCal} \mathrm{~m}^{-3} \)
2. \(\left(\mathrm{KCal} \mathrm{~m}^{-2}\right) \mathrm{yr}^{-1} \)
3. \(\mathrm{gm}^{-2}\)
4. \(\mathrm{KCal} \mathrm{~m}^{-2}\)
Subtopic: Ecosystem Productivity |
79%
Level 2: 60%+
NEET - 2025
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In an ecosystem, if the Net Primary Productivity (NPP) of first trophic level is \(100 x\left(\mathrm{kcal} ~\mathrm{m}^{-2}\right) \mathrm{yr}^{-1},\) what would be the GPP (Gross Primary Productivity) of the third trophic level of the same ecosystem?
| 1. | \(x\left(\mathrm{kcal}~ \mathrm{m}^{-2}\right) y r^{-1}\) |
| 2. | \(10 x\left(\mathrm{kcal} ~\mathrm{m}^{-2}\right) \mathrm{yr}^{-1}\) |
| 3. | \(\dfrac{100 x}{3 x}\left(\mathrm{kcal} ~\mathrm{m}^{-2}\right) \mathrm{yr}^{-1}\) |
| 4. | \(\dfrac{x}{10}\left(\mathrm{kcal} ~\mathrm{m}^{-2}\right) y r^{-1}\) |
Subtopic: Ecosystem Productivity | Energy Flow |
Level 3: 35%-60%
NEET - 2024
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