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Q. No.Unlike a population, an individual has:
1.
Birth and death
2.
Birth rate
3.
Death rate
4.
Sex ratio
Subtopic: Population Attributes |
91%
From NCERT
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The tiger census in our national parks and tiger reserves is often based on:
1. Pug marks
2. Cub count
3. Area allocation
4. Collar position
1. Pug marks
2. Cub count
3. Area allocation
4. Collar position
Subtopic: Population Attributes |
94%
From NCERT
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As a mechanism of defense against herbivory, Calotropis:
1. Has a large number of thorns
2. Secretes cardiac glycosides
3. Produces a neurotoxin, strychnine
4. Releases a hallucinogen
Subtopic: Population Interactions: Predation |
86%
From NCERT
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The maximum population size of the species that the environment can sustain indefinitely is called as:
1. biotic potential
2. natality
3. environmental resistance
4. carrying capacity
1. biotic potential
2. natality
3. environmental resistance
4. carrying capacity
Subtopic: Population Dynamic |
73%
From NCERT
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The growth rate of a natural population equals zero:
| 1. | when N/K is exactly one |
| 2. | when N nears the carrying capacity of the habitat |
| 3. | when N/K equals zero |
| 4. | when mortality is greater than natality |
Subtopic: Population: Logistic Growth Model |
75%
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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
| Assertion(A): | A population that fits the logistic growth model increases more rapidly at intermediate size rather than at relatively small and large sizes. |
| Reason (R): | The population growth rate decreases dramatically as the population size approaches the carrying capacity. |
In the light of the above statements, choose the most appropriate answer from the options given below :
| 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: Population: Logistic Growth Model |
51%
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The competitive exclusion principle can be best expressed as:
| 1. | the more abundant species will exclude the less abundant species through competition |
| 2. | competition for the same resources excludes species having different lifestyles |
| 3. | no two species can occupy the same niche indefinitely when resources are limited |
| 4. | larger organisms exclude smaller ones through competition as in the case of large trees controlling underbrush |
Subtopic: Population Interactions: Competition |
73%
From NCERT
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The two species physically interfere with one another by aggressively attempting to exclude one another from particular habitats in:
1. competitive exclusion
2. predation
3. exploitative competition
4. interference competition
1. competitive exclusion
2. predation
3. exploitative competition
4. interference competition
Subtopic: Population Interactions: Competition |
From NCERT
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Which of the following links ecology to population genetics and evolution?
| 1. | Organismic ecology | 2. | Population ecology |
| 3. | Ecosystem ecology | 4. | Biome ecology |
Subtopic: Introduction to Ecology |
66%
From NCERT
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Which of the following is not usually an adaptation for a parasitic mode of life?
| 1. | Loss of unnecessary sense organs |
| 2. | Presence of adhesive organs or suckers |
| 3. | Loss of the digestive system |
| 4. | Low reproductive capacity |
Subtopic: Population Interactions: Parasitism |
87%
From NCERT
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