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Q. No.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 |
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 |
Subtopic: Population Dynamic |
72%
From NCERT
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A community of living organisms in conjunction with the nonliving components of their environment, interacting as a system is termed:
| 1. | ecosystem | 2. | species |
| 3. | biome | 4. | population |
Subtopic: Introduction to Ecology |
74%
The threat of extinction will be highest for:
| 1. | a very small population in an unstable environment |
| 2. | a moderate-sized population of r strategists |
| 3. | a large population with lots of genetic variabilities |
| 4. | a moderate sized population in a stable environment |
Subtopic: Response of Organisms to Abiotic Factors (OLD NCERT) |
78%
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%
The growth of a population is unlikely to be limited by:
| 1. | predation | 2. | harsh weather |
| 3. | disease | 4. | an abundance of natural resources |
Subtopic: Population Attributes |
67%
Identify the correct statements about symbiotic relationships:
| I: | in a parasitic relationship, one organism is harmed and the other is benefited. |
| II: | coevolution is a feature of many symbiotic relationships. |
| III: | a relationship that appears to be commensalism may in fact be mutualistic or parasitic. |
| IV: | the most efficient type of parasite is one that kills its host. |
| 1. | I, II and III only | 2. | I, III and IV only |
| 3. | II, III and IV only | 4. | I, II, III and IV |
Subtopic: Population Interactions: Predation | Population Interactions: Parasitism | Population Interactions: Coevolution |
59%
Temperature is significant for living organisms as it primarily affects:
| 1. | Body size | 2. | Fertility |
| 3. | Enzyme kinetics | 4. | Muscular contraction |
Subtopic: Abiotic Factors: Temperature (OLD NCERT) |
86%
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): | 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. |
| 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: Population: Logistic Growth Model |
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): | India’s population is set to overtake China’s population by 2025. |
| Reason(R): | The birth rate in china is decreasing while it is increasing in India. |
| 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: Population Attributes |
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