Q. No.Secondary productivity is the rate of formation of new organic matter by:
1. Parasite
2. Consumer
3. Decomposer
4. Producer
Subtopic: Ecosystem Productivity |
87%
From NCERT
AIPMT - 2013
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NEET 2025 - Target Batch
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NEET 2025 - Target Batch
Which ecosystem has the maximum biomass?
1. Grassland ecosystem
2. Pond ecosystem
3. Lake ecosystem
4. Forest ecosystem
Subtopic: Ecosystem Productivity |
70%
NEET - 2017
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NEET 2025 - Target Batch
Hints
Match the List-I with List-II
Choose the correct answer from the options given below:
| List-I | List-II | ||
| (a) | Carbon dissolved in oceans | (i) | 55 billion tons |
| (b) | Annual fixation of carbon through photosynthesis | (ii) | 71% |
| (c) | PAR captured by plants | (iii) | \(4 \times 10^3 \)kg |
| (d) | Productivity of oceans | (iv) | 2 to 10% |
Choose the correct answer from the options given below:
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (iv) | (iii) | (i) |
| 2. | (iii) | (iv) | (ii) | (i) |
| 3. | (ii) | (iii) | (iv) | (i) |
| 4. | (iii) | (ii) | (i) | (iv) |
Subtopic: Ecosystem Productivity |
86%
From NCERT
NEET - 2022
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NEET 2025 - Target Batch
Hints
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NEET 2025 - Target Batch
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. \(\dfrac{x}{10}\left(\mathrm{kcal} ~\mathrm{m}^{-2}\right) y r^{-1}\)
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 |
52%
From NCERT
NEET - 2024
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NEET 2025 - Target Batch
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The rate of formation of new organic matter by rabbits in grassland is called:
1. Secondary productivity
2. Net primary productivity
3. Gross primary productivity
4. Net productivity
Subtopic: Ecosystem Productivity |
81%
From NCERT
AIPMT - 2012
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NEET 2025 - Target Batch
Hints
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NEET 2025 - Target Batch
In the equation
GPP is Gross Primary Productivity. NPP is net Primary Productivity. R here is ___________
1. Reproductive allocation
2. Photosynthetically active radiation
3. Respiratory quotient
4. Respiratory loss
GPP is Gross Primary Productivity. NPP is net Primary Productivity. R here is ___________
1. Reproductive allocation
2. Photosynthetically active radiation
3. Respiratory quotient
4. Respiratory loss
Subtopic: Ecosystem Productivity |
88%
From NCERT
NEET - 2023
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Frugivorous birds are found in large numbers in tropical forests mainly because of :
1. lack of niche specialisation.
2. higher annual rainfall.
3. availability of fruits throughout the year.
4. temperature conducive for their breeding.
1. lack of niche specialisation.
2. higher annual rainfall.
3. availability of fruits throughout the year.
4. temperature conducive for their breeding.
Subtopic: Components & Types of Ecosystems | Ecosystem Productivity |
68%
NEET - 2022
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NEET 2025 - Target Batch
Hints
The amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis is called:
1. Secondary production
2. Primary production
3. Gross primary production
4. Net primary production
1. Secondary production
2. Primary production
3. Gross primary production
4. Net primary production
Subtopic: Ecosystem Productivity |
57%
From NCERT
NEET - 2022
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Hints
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NEET 2025 - Target Batch
Which of the following equations shows the relationship between gross primary productivity (GPP) and net primary productivity (NPP)?
1. GPP = NPP - photosynthesis
2. NPP = GPP - photosynthesis
3. GPP = NPP - plant respiration
4. NPP = GPP - plant respiration
1. GPP = NPP - photosynthesis
2. NPP = GPP - photosynthesis
3. GPP = NPP - plant respiration
4. NPP = GPP - plant respiration
Subtopic: Ecosystem Productivity |
84%
From NCERT
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Hints
Please attempt this question first.
Consider the two statements:
1. Statement I is correct; Statement II is correct
2. Statement I is incorrect; Statement II is correct
3. Statement I is correct; Statement II is incorrect
4. Statement I is incorrect; Statement II is incorrect
| Statement I: | Gross primary productivity (GPP) minus respiration losses (R), is the net primary productivity (NPP). |
| Statement II: | GPP is available for consumption by herbivores. |
2. Statement I is incorrect; Statement II is correct
3. Statement I is correct; Statement II is incorrect
4. Statement I is incorrect; Statement II is incorrect
Subtopic: Ecosystem Productivity |
80%
From NCERT
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Hints
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