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Q. No.If the population of a city of 100 people increases at an intrinsic rate of 0.1, but the city only has access to food and housing for 200 people, what will the current growth rate of the population be?
1. 9/year
2. Zero
3. 2/year
4. 5/year
Subtopic: Population Attributes |
From NCERT
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Identify the correct statements:
| I. | Ramdeo Misra is revered as the Father of Ecology in India. |
| II. | Ecology studies the interactions among organisms and between the organism and its physical [abiotic] environment. |
| III. | The study of Ecology begins at cellular biological organisation level. |
| IV. | Ecology at the organism level is essentially physiological ecology. |
| 1. | Only I and II | 2. | All except III |
| 3. | Only II, III and III | 4. | I, II, III and IV |
Subtopic: Introduction to the Chapter |
55%
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): | The physico-chemical [abiotic] components of ecosystem alone characterise the habitat of an organism. |
| Reason (R): | Interactions between organisms are not relevant for the study of ecology. |
| 1. | Both (A) and (R) are false. |
| 2. | Both (A) and (R) are true but (R) does not explain (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are true and (R) explains (A). |
Subtopic: Introduction to Ecology | Introduction to the Chapter |
73%
From NCERT
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Niche of an organism includes:
| I: | range of conditions that it can tolerate |
| II: | diversity in the resources it utilises |
| III: | its distinct functional role in the ecological system |
| 1. | Only I | 2. | Only III |
| 3. | Only II and III | 4. | I, II and III |
Subtopic: Introduction to Ecology | Introduction to the Chapter |
76%
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): | Organisms living in oceans do not face any water-related problems. |
| Reason (R): | Life on Earth originated in water and is not sustainable without water. |
| 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: Abiotic Factors: Light & Water (OLD NCERT) |
85%
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): | The availability of light on land is closely linked with that of temperature. |
| Reason (R): | Sun is the source for both – light and temperature. |
| 1. | (A) is true but (R) is false. |
| 2. | Both (A) and (R) are true and (R) explains (A). |
| 3. | Both (A) and (R) are true but (R) does not explain (A). |
| 4. | (A) is false but (R) is true. |
Subtopic: Abiotic Factors: Temperature (OLD NCERT) | Abiotic Factors: Light & Water (OLD NCERT) |
82%
From NCERT
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Identify the correct statements:
1. Only Statement I and Statement II
2. Only Statement I and Statement III
3. Only Statement II and Statement III
4. Statement I, Statement II and Statement III
| Statement I: | Many plants depend on sunlight to meet their photoperiodic requirement for flowering. |
| Statement II: | Many animals use photoperiod cues for timing their foraging, reproductive and migratory activities. |
| Statement III: | The spectral quality of solar radiation is not important for life. |
1. Only Statement I and Statement II
2. Only Statement I and Statement III
3. Only Statement II and Statement III
4. Statement I, Statement II and Statement III
Subtopic: Abiotic Factors: Light & Water (OLD NCERT) |
85%
From NCERT
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Soil is an important abiotic factor in an ecosystem because:
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
| I. | Its characteristics determine, to a large extent, the vegetation in any area. |
| II. | In the aquatic environment, the sediment characteristics often determine the type of benthic animals that can thrive there. |
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
Subtopic: Response of Organisms to Abiotic Factors (OLD NCERT) |
90%
From NCERT
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Maintenance of a constant internal environment, in spite of an ever-changing external environment, by living organisms is called :
| 1. | Hemostasis | 2. | Homeostasis |
| 3. | Thermoregulation | 4. | Osmoregulation |
Subtopic: Response of Organisms to Abiotic Factors (OLD NCERT) |
82%
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): | Ability to maintain a constant internal environment enhances the overall ‘fitness’ of the species. |
| Reason (R): | A constant internal environment permits all biochemical reactions and physiological functions to proceed with maximal efficiency. |
| 1. | (A) is true but (R) is false. |
| 2. | (A) is false but (R) is true. |
| 3. | Both (A) and (R) are true and (R) explains (A). |
| 4. | Both (A) and (R) are true but (R) does not explain (A). |
Subtopic: Abiotic Factors: Temperature (OLD NCERT) | Abiotic Factors: Light & Water (OLD NCERT) | Response of Organisms to Abiotic Factors (OLD NCERT) |
88%
From NCERT
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