- 1(current)
Q. No.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 |
67%
Level 2: 60%+
NEET - 2026
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Hints
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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 |
73%
Level 2: 60%+
NEET - 2026
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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 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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Hints
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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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Hints
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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 |
88%
Level 1: 80%+
NEET - 2024
Hints
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
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 |
86%
Level 1: 80%+
AIPMT - 2011
Hints
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%
Level 1: 80%+
AIPMT - 2011
Hints
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%
Level 1: 80%+
AIPMT - 1999
Hints
- 1(current)
Q. No.
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