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Q. No.Given below are two statements
Statement I:
The rate of decomposition is not related to chemical composition of detritus and climatic factors.
Statement II:
In a particular climatic condition, decomposition rate is faster if detritus is rich in lignin and chitin.
In light of the above statements, choose the correct answer from the options given below:
1. Both Statement I and Statement II are True
2. Both Statement I and Statement II are False
3. Statement I is True but Statement II is False
4. Statement I is False but Statement II is True
Subtopic: Decomposition |
82%
Level 1: 80%+
NEET - 2024
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NEET 2026 - Target Batch - Vital
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NEET 2026 - Target Batch - Vital
Match List-I with List-II:
Choose the correct answer from the options given below:
1. A-I, B-II, C-III, D-IV
2. A-III, B-IV, C-II, D-I
3. A-III, B-II, C-IV, D-I
4. A-II, B-III, C-IV, D-I
| List-I | List-II | ||
| A. | Tertiary consumer | I. | Grass |
| B. | Secondary consumer | II. | Lion |
| C. | Primary consumer | III. | Wolf |
| D. | Primary producer | IV. | Goat |
1. A-I, B-II, C-III, D-IV
2. A-III, B-IV, C-II, D-I
3. A-III, B-II, C-IV, D-I
4. A-II, B-III, C-IV, D-I
Subtopic: Ecological Flow |
89%
Level 1: 80%+
NEET - 2024
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NEET 2026 - Target Batch - Vital
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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%
Level 3: 35%-60%
NEET - 2024
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NEET 2026 - Target Batch - Vital
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Assertion(A): Decomposition process is slower if detritus is rich in lignin and chitin
Reason(R): Decomposition is largely an oxygen requiring process
Reason(R): Decomposition is largely an oxygen requiring process
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A) |
| 2. | Both (A) and (R) are true, but (R) is not the correct explanation of (A) |
| 3. | (A) is true, but (R) is false |
| 4. | (A) is false, but (R) is true |
Subtopic: Decomposition |
70%
Level 2: 60%+
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The primary productivity in an ecosystem is expressed as:
1. \(\text {gm}^{-2}~ \text { yr}^{-1}\)
2. \(\text {gm}^{-2}~ \text { yr}\)
3. \(\text {kcal m}^{-2}~ \text { yr}^{-1}\)
4. \(\text {kcal}{}~ \text { m}^{-2}\)
1. \(\text {gm}^{-2}~ \text { yr}^{-1}\)
2. \(\text {gm}^{-2}~ \text { yr}\)
3. \(\text {kcal m}^{-2}~ \text { yr}^{-1}\)
4. \(\text {kcal}{}~ \text { m}^{-2}\)
Subtopic: Ecosystem Productivity |
Level 3: 35%-60%
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Select true(T) or false(F) for the given statements and choose the correct option.
| A: | Any calculations of energy content, biomass or numbers has to include all organisms at the trophic level |
| B: | A given species occupies only one trophic level in the same ecosystem at the same time. |
| A | B | |
| 1. | T | T |
| 2. | T | F |
| 3. | F | T |
| 4. | F | F |
Subtopic: Ecological Pyramids |
70%
Level 2: 60%+
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Read the following statements and select the correct option:
| A: | It is said that Detritus food chain may be connected to grazing food chain at some levels. |
| B: | Some of the organisms of DFC are prey to the GFC animals. |
| 1. | Both A and B are correct and B is correct explanation of A |
| 2. | Both A and B are correct but B is not correct explanation of A |
| 3. | Only B is correct, A is incorrect |
| 4. | Only A is correct, B is incorrect |
Subtopic: Energy Flow |
82%
Level 1: 80%+
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Which one is incorrectly matched?
| 1. | Carnivores | - | Secondary or tertiary consumer |
| 2. | Herbivores | - | Primary consumer |
| 3. | Decomposers | - | Microbial heterotrophs |
| 4. | Detrivores | - | Secondary consumers |
Subtopic: Energy Flow |
88%
Level 1: 80%+
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Select the incorrect statement
| 1. | All the steps in decomposition operate simultaneously on the humus. |
| 2. | Humus is dark colored amorphous substance |
| 3. | Humus undergoes decomposition at very slow rate |
| 4. | Humus serves as reservoir of nutrients. |
Subtopic: Decomposition |
83%
Level 1: 80%+
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Given below are two statements:
| Assertion (A): | Pyramid of energy is always upright, can never be inverted. |
| Reason (R): | When energy flows from a particular trophic level to the next trophic level, some energy is always lost as heat at each step. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Ecological Pyramids |
91%
Level 1: 80%+
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