Select Question Set:
Q. No.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
Please attempt this question first.
Hints
Please attempt this question first.
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
Please attempt this question first.
Hints
Please attempt this question first.
Consider the two statements:
| Assertion (A): | The pyramid of biomass may be "inverted" in a pond ecosystem |
| Reason (R): | In a pond ecosystem, the standing crop of phytoplankton, the major producers, at any given point will be lower than the mass of the heterotrophs, such as fish and insects. |
| 1. | Both (A) and (R) are True and the (R) correctly explains (A). |
| 2. | Both (A) and (R) are True but the (R) does not correctly explain (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Ecological Flow |
88%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Study the given pyramid and select the correct statements based on the given figure?
| I: | It represents an ideal pyramid of energy in an ecosystem. |
| II: | Primary producers convert only 1% of the energy in the sunlight available to them into NPP. |
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
Subtopic: Ecological Pyramids |
70%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
How many of the given statements are true?
1. 1
2. 2
3. 3
4. 4
| I: | The trophic level of an organism is the position it occupies in a food web. |
| II: | The trophic level represents species and not a functional level. |
| III: | A given organism occupies only one trophic level in a food chain. |
| IV: | The trophic level of an organism is the number of steps it is from the start of the chain. |
1. 1
2. 2
3. 3
4. 4
Subtopic: Ecological Pyramids |
53%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
In most ecosystems, which of the following pyramids are upright?
I: pyramid of number
II: pyramid of energy
III: pyramid of biomass
1. Only II
2. Only I and III
3. Only I and II
4. I, II and III
I: pyramid of number
II: pyramid of energy
III: pyramid of biomass
1. Only II
2. Only I and III
3. Only I and II
4. I, II and III
Subtopic: Ecological Pyramids |
57%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Consider the two statements:
| Assertion (A): | Pyramid of energy can be inverted in aquatic ecosystems. |
| Reason (R): | Aquatic life defies second law of thermodynamics. |
| 1. | Both (A) and (R) are True and the (R) correctly explains (A). |
| 2. | Both (A) and (R) are True but the (R) does not correctly explain (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Ecological Flow | Ecological Pyramids |
84%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
Ecological pyramids do not take into account:
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
| I: | The apex predators |
| II: | the same species belonging to two or more trophic levels |
| III: | saprophytes |
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
Subtopic: Ecological Pyramids |
79%
From NCERT
Please attempt this question first.
Hints
Please attempt this question first.
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
Please attempt this question first.
Hints
Please attempt this question first.
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
Please attempt this question first.
Hints
Please attempt this question first.
Select Question Set:
© 2025 GoodEd Technologies Pvt. Ltd.