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Q. No.Mark the incorrect match
1.
Primary productivity - Varies in different types of ecosystems
2.
GPP - Available biomass for the consumption to herbivores
3.
55 billion tons - Annual NPP of oceans
4.
Secondary productivity - Rate of formation of new organic matter by consumers
Subtopic: Ecosystem Productivity |
62%
From NCERT
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Which of the following statement about GFC is incorrect?
| 1. | Sun is the source of energy |
| 2. | Begins with consumers |
| 3. | Major conduit for energy flow in aquatic ecosystems |
| 4. | Size of organisms commonly increase at higher trophic levels |
Subtopic: Energy Flow |
59%
From NCERT
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Humification results in the formation of ---- substance
1. Colloidal, Basic
2. Acidic, Dark coloured
3. Amorphous, Light coloured
4. Light-coloured, Colloidal
1. Colloidal, Basic
2. Acidic, Dark coloured
3. Amorphous, Light coloured
4. Light-coloured, Colloidal
Subtopic: Decomposition |
51%
From NCERT
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Consider the given two statements:
| Assertion (A): | In an ecosystem, organisms are linked through food chains and food webs. |
| Reason (R): | No energy that is trapped into an organism remains in it forever. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | (A) is True but (R) is False |
| 3. | (A) is False but (R) is True |
| 4. | Both (A) and (R) are True but (R) does not correctly explain (A). |
Subtopic: Energy Flow |
55%
From NCERT
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The amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis is:
| 1. | Primary production | 2. | Primary productivity |
| 3. | Secondary production | 4. | Secondary productivity |
Subtopic: Ecosystem Productivity |
From NCERT
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During decomposition, degradation of detritus into simpler inorganic substances is called:
1. Catabolism
2. Leaching
3. Chelation
4. Fragmentation
1. Catabolism
2. Leaching
3. Chelation
4. Fragmentation
Subtopic: Decomposition |
59%
From NCERT
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What percent of the incident solar radiation is photosynthetically active radiation (PAR)?
1. only about 1 to 5
2. only about 2 to 10
3. around but less than 50
4. 90 to 95
1. only about 1 to 5
2. only about 2 to 10
3. around but less than 50
4. 90 to 95
Subtopic: Components & Types of Ecosystems |
59%
From NCERT
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Consider the given two statements:
| Assertion (A): | Heterotrophs generally have high energy conversion efficiencies when compared to those of plants. |
| Reason (R): | At higher trophic levels, the respiratory costs are dramatically reduced. |
| 1. | (A) is True but (R) is False |
| 2. | Both (A) and (R) are True and (R) correctly explains (R) |
| 3. | Both (A) and (R) are True and but (R) does not correctly explain (A) |
| 4. | Both (A) and (R) are False |
Subtopic: Energy Flow |
52%
From NCERT
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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
In the light of the above statements, choose the most appropriate answer from the options given below :
| Assertion (A): | Most ecosystems would vanish if the sun were not, continuously, providing energy to the Earth. |
| Reason (R): | Ecosystems and living organisms defy second law of thermodynamics. |
| 1. | Both (A) and (R) are True but (R) does not explain (A). |
| 2. | (A) is True but (R) is False. |
| 3. | (A) is False but (R) is True. |
| 4. | Both (A) and (R) are True and (R) explains (A). |
Subtopic: Energy Flow |
62%
From NCERT
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NEET 2026 - Target Batch - Vital
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NEET 2026 - Target Batch - Vital
Read the following statements and select the correct option.
1. Only statement A is correct
2. Only statement B is correct
3. Both statements A and B are correct
4. Both statements A and B are incorrect
| Statement A: | Detritus is raw material for decomposition. |
| Statement B: | Detritus food chain does not involve autotrophs. |
2. Only statement B is correct
3. Both statements A and B are correct
4. Both statements A and B are incorrect
Subtopic: Decomposition |
59%
From NCERT
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