- 1(current)
Q. No.A complex of interconnected food chains in an ecosystem is called a(an)
1. ecosystem
2. pyramid of numbers
3. pyramid of biomass
4. food web
1. ecosystem
2. pyramid of numbers
3. pyramid of biomass
4. food web
Subtopic: Energy Flow |
96%
From NCERT
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Which of the following shows the correct flow of energy through ecosystems?
1. sun → primary consumer → secondary consumer → producer
2. sun → producer → secondary consumer → primary consumer
3. sun → secondary consumer → primary consumer → producer
4. sun → producer → primary consumer → secondary consumer
1. sun → primary consumer → secondary consumer → producer
2. sun → producer → secondary consumer → primary consumer
3. sun → secondary consumer → primary consumer → producer
4. sun → producer → primary consumer → secondary consumer
Subtopic: Energy Flow |
98%
From NCERT
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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 |
89%
From NCERT
NEET - 2024
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NEET 2025 - Target Batch
Hints
Identify the likely organisms (a), (b), (c), and (d) in the food web shown below:
|
(a) |
(b) |
(c) |
(d) |
|
|
1. |
Dog |
Squirrel |
Bat |
Deer |
|
2. |
Rat |
Dog |
Tortoise |
Crow |
|
3. |
Squirrel |
Cat |
Rat |
Pigeon |
|
4. |
Deer |
Rabbit |
Frog |
Rat |
Subtopic: Energy Flow |
85%
AIPMT - 2012
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NEET 2025 - Target Batch
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. \(\dfrac{x}{10}\left(\mathrm{kcal} ~\mathrm{m}^{-2}\right) y r^{-1}\)
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
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Of the given two statements:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | A constant input of solar energy is the basic requirement for almost all ecosystems to function and sustain. |
| II: | There is unidirectional movement of energy towards the higher trophic levels and its dissipation as heat to the environment. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Ecosystem Productivity | Energy Flow |
95%
From NCERT
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In a terrestrial ecosystem, major producers are:
1. herbaceous and woody plants.
2. phytoplankton
3. algae
4. mosses
1. herbaceous and woody plants.
2. phytoplankton
3. algae
4. mosses
Subtopic: Energy Flow |
89%
From NCERT
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Regarding the given 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: | Herbivores are primary consumers. |
| Statement II: | Primary carnivores are secondary consumers. |
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: Energy Flow |
96%
From NCERT
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Identify the incorrect statement:
| 1. | Death of an organism is the beginning of the detritus food chain/web. |
| 2. | In an aquatic ecosystem, the detritus food chain (DFC) is the major conduit for energy flow. |
| 3. | In a terrestrial ecosystem, a much larger fraction of energy flows through the detritus food chain than through the grazing food chain (GFC). |
| 4. | Detritus food chain may be connected with the grazing food chain at some levels. |
Subtopic: Energy Flow |
85%
From NCERT
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Consider the two statements:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | The number of trophic levels in the grazing food chain is restricted. |
| II: | The transfer of energy follows 10 per cent law – only 10 per cent of the energy is transferred to each trophic level from the lower trophic level. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Energy Flow |
87%
From NCERT
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- 1(current)
Q. No.
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