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Q. No.Which of the following links ecology to population genetics and evolution?
| 1. | Organismic ecology | 2. | Population ecology |
| 3. | Ecosystem ecology | 4. | Biome ecology |
Subtopic: Population Dynamic |
65%
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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): | Age-structure pyramids for the population of a country not only predict a population’s growth trends but can also illuminate social conditions. |
| Reason (R): | These pyramids show the distribution of various age groups in a population, typically that of a country or region of the world. |
| 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. |
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Subtopic: Age Pyramid |
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Which of the following would necessarily decrease the density of a population in a given habitat?
| 1. | Natality> mortality | 2. | Immigration >emigration |
| 3. | Mortality and emigration | 4. | Natality and immigration |
Subtopic: Population Characters: Density |
89%
From NCERT
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While heat gain or heat loss is the function of ________, heat production is the function of _______ of the body of an animal.
1. Volume; Surface area
2. Surface area; Volume
3. Volume; Volume
4. Surface area; Surface area
Subtopic: Response of Organisms to Abiotic Factors (OLD NCERT) |
78%
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A feature of ‘r’ strategists would be:
| 1. | few offspring | 2. | little parental care |
| 3. | sigmoid growth curves | 4. | a longer generation time |
Subtopic: Population Dynamic |
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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): | Ecologically similar species can coexist in a community if one or more significant differences in their niches arise through time. |
| Reason (R): | Two species cannot coexist permanently in a community if their niches are identical. |
| 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. |
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
Subtopic: Introduction to Ecology |
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Subtopic: Population Interactions: Competition |
53%
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Ecology at the organismic level is essentially:
1. Physiological ecology
2. Biochemical ecology
3. Anatomical ecology
4. Pathological ecology
Subtopic: Introduction to Ecology | Introduction to the Chapter |
79%
From NCERT
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The relationship between cattle egret and grazing cattle can be best described as:
| 1. | Mutualism | 2. | Commensalism |
| 3. | Parasitism | 4. | Competition |
Subtopic: Population Interactions: Commensalism, Protocooperation & Mutualism |
85%
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Identify the correct statement:
| 1. | Eutrophic lakes contain fewer nutrients than oligotrophic lakes. |
| 2. | Xerarch succession is a primary succession that occurs in water bodies. |
| 3. | Most ecologists believe that most communities achieve stable, unchanging climax vegetation. |
| 4. | A mature ecosystem has greater species richness, greater biomass, and less net productivity than a younger stage of succession. |
Subtopic: Response of Organisms to Abiotic Factors (OLD NCERT) |
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