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Q. No.Which of the following ecological pyramids is/are never inverted in any ecosystem?
I:
Pyramid of numbers
II:
Pyramid of biomass
III:
Pyramid of energy
1. Only I and II
2. Only III
3. Only I and III
4. I, II and III
Subtopic: Ecological Pyramids |
87%
From NCERT
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Which organism in a food chain in an ecosystem will be a secondary consumer?
1. a carnivore
2. a herbivore
3. a plant
4. a decomposer
1. a carnivore
2. a herbivore
3. a plant
4. a decomposer
Subtopic: Energy Flow |
89%
From NCERT
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Consider the given two statements:
| Assertion (A): | In a food chain, man is considered as an apex predator and a top consumer. |
| Reason (R): | In a food chain, man is placed at the top and has no known natural predators. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True and (R) does not correctly explain (A) |
| 3. | (A) is True, (R) is False |
| 4. | (A) is False, (R) is False |
Subtopic: Energy Flow |
72%
From NCERT
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Identify the correctly matched pairs:
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
| I: | Gross primary productivity | The energy that's left for the primary producers to use for growth and reproduction, or that becomes available to consumers at the next trophic level. |
| II: | Net Primary Productivity | The total amount of organic matter that primary producers (usually plants through photosynthesis) synthesize in an ecosystem over a given period of time. |
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
Subtopic: Ecosystem Productivity |
82%
From NCERT
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How many statements regarding detritus food chain are correct?
1. 0
2. 1
3. 2
4. 3
| I: | It begins with dead organic matter. |
| II: | It is the major conduit for energy flow in aquatic ecosystem. |
| III: | It is not connected with the grazing food chain at any level. |
1. 0
2. 1
3. 2
4. 3
Subtopic: Energy Flow |
74%
From NCERT
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In ecosystems, the flow of energy is:
| 1. | Cyclical, like the flow of nutrients. |
| 2. | Unidirectional from the sun through various trophic levels. |
| 3. | From consumers to producers to decomposers. |
| 4. | Equally distributed among all trophic levels |
Subtopic: Components & Types of Ecosystems |
96%
From NCERT
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Primary productivity in an ecosystem refers to:
| 1. | The rate at which consumers produce organic material. |
| 2. | The amount of biomass produced by decomposers. |
| 3. | The rate at which producers synthesize organic material from inorganic substances. |
| 4. | The total amount of organic material available in the ecosystem. |
Subtopic: Ecosystem Productivity |
84%
From NCERT
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Consider the given two statements:
| Assertion (A): | In a terrestrial ecosystem, the pyramid of biomass is generally upright. |
| Reason (R): | Producers have a higher biomass than that of consumers in terrestrial ecosystems. |
Choose the correct option.
| 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: Ecological Pyramids |
94%
From NCERT
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Ecological pyramids represent the:
| 1. | Biomass, energy, or number of organisms at each trophic level in a food chain. |
| 2. | Interaction between different species within an ecosystem. |
| 3. | Migration patterns of different species in an ecosystem. |
| 4. | Reproductive success rate across different trophic levels. |
Subtopic: Ecological Pyramids |
94%
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Stratification in an ecosystem refers to:
| 1. | The layering of plants and animals in different heights and depths. |
| 2. | The distribution of nutrients in soil and water. |
| 3. | The cycling of matter through biotic and abiotic components. |
| 4. | The decomposition process. |
Subtopic: Components & Types of Ecosystems |
90%
From NCERT
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