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Q. No.In ecological terms, a population should be defined as a group of:
1. Communities in an ecosystem
2. Species in a community
3. Individuals in a family
4. Individuals in a species
1. Communities in an ecosystem
2. Species in a community
3. Individuals in a family
4. Individuals in a species
Subtopic: Introduction to Ecology |
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An association of individuals of different species living in the same habitat and having functional interactions is known as:
| 1. | Ecological niche | 2. | Biotic community |
| 3. | Ecosystem | 4. | Population |
Subtopic: Introduction to Ecology |
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In ‘competitive release’:
| 1. | differences among similar species whose distributions overlap geographically are accentuated in regions where the species co-occur, but are minimized or lost where the species' distributions do not overlap. |
| 2. | two species which compete for the same limited resource cannot coexist at constant population values. |
| 3. | there is an expansion of the range of a species when a competitor for its niche is removed. |
| 4. | there is a division of limited resources by species to help avoid competition in an ecological niche. |
Subtopic: Population Interactions: Predation |
51%
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In the logistic growth of a population, the acceleration phase is followed by a/an:
| 1. | Lag phase | 2. | Deceleration phase |
| 3. | Asymptote | 4. | Sudden crash phase |
Subtopic: Population: Logistic Growth Model |
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| Assertion (A): | The female anopheles mosquito is not considered a parasite |
| Reason (R): | The bite of the female anopheles mosquito injects infective stage of malarial parasite into human blood |
| 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 Interactions: Parasitism |
60%
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Consider the two given statements:
| I: | The life cycles of endoparasites are more complex than that of the ectoparasites. |
| II: | The morphological and anatomical features of endoparasites are greatly simplified. |
| 1. | Both I and II are correct and II explains I |
| 2. | Both I and II are correct but II does not explain I |
| 3. | I is correct but II is incorrect |
| 4. | Both I and II are incorrect |
Subtopic: Population Interactions: Parasitism |
53%
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Logistic growth in a population is characterized by:
| 1. | A constant rate of growth regardless of population size. |
| 2. | An exponential growth followed by a stabilization at the carrying capacity. |
| 3. | Decrease in population size after reaching the carrying capacity. |
| 4. | A linear increase in population size over time. |
Subtopic: Population: Logistic Growth Model |
63%
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Growth rate of a natural population will be equal to zero when:
(1) N/K is exactly one
(2) N nears the carrying capacity of the habitat
(3) N/K equals zero
(4) mortality is greater than natality
Subtopic: Population: Logistic Growth Model |
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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: Population Attributes |
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Which of the following statements captures the essence of Gause's principle of competitive exclusion?
| 1. | "the more abundant species will exclude the less abundant species through competition" |
| 2. | "competition for the same resources excludes species having different life styles" |
| 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 |
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