- 1(current)
Q. No.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). |
In the light of the above statements, choose the most appropriate answer from this 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: Ecosystem Productivity | Energy Flow |
64%
From NCERT
NEET - 2025
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Hints
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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 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 |
62%
From NCERT
NEET - 2025
Please attempt this question first.
Hints
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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 |
51%
From NCERT
NEET - 2024
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
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NEET 2026 - Target Batch - Vital
Consider the pyramid of energy of an ecosystem given below :
If \(\text T_4\) is equivalent to \(1000~\text J,\) what is the value of T1?
If \(\text T_4\) is equivalent to \(1000~\text J,\) what is the value of T1?
| 1. | \(\dfrac{ 1000 }{10}~\text J\) | 2. | \(\dfrac{ 1000}{10} \times 4~\text J \) |
| 3. | \(10,000~\text J\) | 4. | \(10,00,000~\text J \) |
Subtopic: Energy Flow |
89%
From NCERT
NEET - 2024
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
Mass of living matter at a tropic level in an area at any time is called:
| 1. | Detritus | 2. | Humus |
| 3. | Standing state | 4. | Standing crop |
Subtopic: Energy Flow | Ecological Pyramids |
87%
From NCERT
AIPMT - 2011
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NEET 2026 - Target Batch - Vital
Hints
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NEET 2026 - Target Batch - Vital
Of the total incident solar radiation, proportion of PAR is:
1. about 60%
2. about 50%
3. more than 80%
4. about 70%
2. about 50%
3. more than 80%
4. about 70%
Subtopic: Energy Flow |
90%
From NCERT
AIPMT - 2011
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
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NEET 2026 - Target Batch - Vital
Percentage of energy transferred to the higher tropic level in a food chain is:
| 1. | 1% | 2. | 10% |
| 3. | 90% | 4. | 100% |
Subtopic: Energy Flow |
93%
From NCERT
AIPMT - 1999
To view explanation, please take trial in the course.
NEET 2026 - Target Batch - Vital
Hints
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NEET 2026 - Target Batch - Vital
- 1(current)
Q. No.
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