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Q. No.Select the correct equation for population density at time t+1,
1. \({N_{t+1} =N_t} + [(B + I) - (D +E)]\)
2. \({N_{t+1} =N_t} \times [(B + E) - (D + I)]\)
3. \({N_{t+1} =N_t} + [(B + I) + (D + E)]\)
4. \({N_{t+1} =N_t} \times [(B + D) - (E + I)]\)
Subtopic: Population Characters: Natality & Mortality |
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Level 2: 60%+
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Identify the correctly matched pair:
1. Only I, II and III
2. Only I, III and IV
3. Only II, III and IV
4. I, II, III and IV
| Scientist | Contribution | |
| I: | Connell | Competitive release |
| II: | Gauss | Competitive exclusion principle |
| III: | MacArthur | Resource partitioning |
| IV: | Tillman | Rivet popper hypothesis |
1. Only I, II and III
2. Only I, III and IV
3. Only II, III and IV
4. I, II, III and IV
Subtopic: Population Interactions: Competition |
59%
Level 3: 35%-60%
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Which of the following is least likely to affect the size of a population?
| 1. | Competition | 2. | Brood parasitism |
| 3. | Commensalism | 4. | Predation |
Subtopic: Population Interactions: Commensalism, Protocooperation & Mutualism |
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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: 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: Population Attributes |
56%
Level 3: 35%-60%
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Consider the given two statements:
| Assertion (A): | Predators in nature are ‘prudent’. |
| Reason (R): | Predators keep prey populations under control. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A) |
| 3. | (A) is True, (R) is False |
| 4. | (A) is False, (R) is True |
Subtopic: Population Interactions: Predation |
Level 3: 35%-60%
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There are 250 snails in a pond and within a year their number increases to 2500 by reproduction. What should be their birth rate (in per snail per year)?
| 1. | 10 | 2. | 9 |
| 3. | 25 | 4. | 15 |
Subtopic: Population Characters: Natality & Mortality |
Level 3: 35%-60%
NEET - 2023
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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 |
Level 3: 35%-60%
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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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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 |
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