Q. No.What distinguishes a population from an individual organism in terms of birth and death?
| 1. | An individual has birth rates and death rates, while a population does not. |
| 2. | A population has birth rates and death rates, whereas an individual organism only has births and deaths. |
| 3. | An individual organism can have both per capita birth and death rates. |
| 4. | A population does not experience birth or death. |
Subtopic: Population Attributes |
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Why are population sizes often estimated indirectly rather than by directly counting all individuals?
| 1. | Because indirect methods provide more inaccurate and biased estimates. |
| 2. | Because counting individuals directly is entirely unnecessary in ecological studies. |
| 3. | Because direct counting is time-consuming, impractical, or impossible for large and mobile populations. |
| 4. | Because populations remain constant and do not require continuous monitoring. |
Subtopic: Population Attributes |
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Consider the given two statements:
| Assertion (A): | Population size, also known as population density (N), does not always have to be measured in terms of numbers. |
| Reason (R): | In some cases, measuring total number may be either meaningless or difficult, making alternative measures of population density more appropriate. |
| 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: Population Attributes |
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In a certain population, natality = 20, mortality = 15, immigration = 4, emigration = 9. The net change will be
| 1. | +0 | 2. | +5 |
| 3. | −5 | 4. | +9 |
Subtopic: Population Attributes |
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What can be predicted about the growth status in coming future of the population for which the age sex pyramid is shown below?
| 1. | It will remain stable |
| 2. | It will grow in size |
| 3. | It will decline in size |
| 4. | Nothing can be predicted on the basis of the given pyramid |
Subtopic: Population Attributes |
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If in a pond there were 40 lotus plants last year and through reproduction 16 new plants are added, taking the current population to 56, the birth rate will be calculated as:
1. 0.2 offspring per lotus per year.
2. 0.4 offspring per lotus per year.
3. 1.2 offspring per lotus per year.
4. 1.6 offspring per lotus per year.
1. 0.2 offspring per lotus per year.
2. 0.4 offspring per lotus per year.
3. 1.2 offspring per lotus per year.
4. 1.6 offspring per lotus per year.
Subtopic: Population Attributes |
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The attribute that distinguishes a population from an individual organism is:
| 1. | survival | 2. | metabolism |
| 3. | sex ratio | 4. | homeostasis |
Subtopic: Population Attributes |
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| Assertion (A): | Population ecology is an important area in Biology. |
| Reason (R): | It links ecology to population genetics and evolution. |
| 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: Population Attributes |
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Asymptote in a logistic growth curve is obtained when
1. K = N
2. K > N
3. K < N
4. Value of ‘r’ approaches zero
Subtopic: Population Attributes |
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If the population pyramid of an associated population has an extremely broad base, it is:
| 1. | a rapidly expanding population |
| 2. | a stable population |
| 3. | a population where there were more old individuals than young individuals |
| 4. | a population with more males than females |
Subtopic: Population Attributes |
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