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Q. No.Given below are two population pyramids, both of India, one for year 2000 and another for year 2020:
| 1. | Pyramid A is of 2020 as it has a broader base |
| 2. | Pyramid B is of 2000 as it has more females in the younger age groups |
| 3. | Pyramid B is of 2020 as it has more females in the younger age groups |
| 4. | Pyramid A is of 2000 as it has a broader base |
Subtopic: Â Population Attributes |
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To evolve the desired traits, natural selection operates at the level of:
| 1. | Organism | 2. | Population |
| 3. | Species | 4. | Biological community |
Subtopic: Â Population Attributes |
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Consider the given two statements:
| Assertion (A): | The tiger census in our national parks and tiger reserves is often based on pug marks and fecal pellets. |
| Reason (R): | For ecological investigations, it is mandatory to know the absolute population densities in all instances. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | (A) is True but (R) is False |
| 3. | (A) is False but (R) is True |
| 4. | Both (A) and (R) are True but (R) does not correctly explain (A). |
Subtopic: Â Population Attributes |
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The population density of Siberian cranes at Bharatpur wetlands in a given year could be described as:
| 1. | Low, because their numbers are typically fewer than 10. |
| 2. | High, because they congregate in large flocks. |
| 3. | Average, as they share resources with other wetland species. |
| 4. | Increasing, due to favourable habitat conditions. |
Subtopic: Â Population Attributes |
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