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Q. No.As a part of their reproductive strategy, pelagic fishes:
1.
Produce a large number of small-sized offspring
2.
Produce a small number of small-sized offspring
3.
Produce a large number of large-sized offspring
4.
Produce a small number of large-sized offspring
Subtopic: Life History Variations |
91%
From NCERT
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A population interaction that is detrimental to both species would be:
| 1. | Mutualism | 2. | Competition |
| 3. | Predation | 4. | Amensalism |
Subtopic: Population Interactions: Competition |
76%
From NCERT
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A population interaction where one species is harmed whereas the other is unaffected is called as:
| 1. | Mutualism | 2. | Competition |
| 3. | Predation | 4. | Amensalism |
Subtopic: Population Interactions: Amensalism |
92%
From NCERT
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Identify the incorrectly matched pair:
|
Population interaction |
Species A |
Species B |
|
|
1. |
Mutualism |
+ |
+ |
|
2. |
Predation |
+ |
- |
|
3. |
Parasitism |
- |
- |
|
4. |
Commensalism |
+ |
0 |
Subtopic: Population Interactions: Predation | Population Interactions: Parasitism |
94%
From NCERT
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In broad ecological context, all the following would be considered examples of predation except:
1. Tiger eating deer
2. Sparrow eating seed
3. Cow eating herbs
4. Earthworm feeding on detritus
Subtopic: Population Interactions: Predation |
83%
From NCERT
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Predators do not:
| 1. | act as ‘conduits’ for energy transfer across trophic levels |
| 2. | keep prey populations under control |
| 3. | over-exploit their prey |
| 4. | help in maintaining species diversity in a community |
Subtopic: Population Interactions: Predation |
84%
From NCERT
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When certain exotic species are introduced into a geographical area, they become invasive mainly because:
| 1. | The invaded land has unlimited resources for the introduced species |
| 2. | The invaded land does not have its natural predator |
| 3. | The population of the introduced species in the invaded land is very low |
| 4. | Introduced species do not face any competition in the introduced land |
Subtopic: Population Interactions: Predation |
80%
From NCERT
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In a field experiment, when all Pisaster starfish were removed from an enclosed intertidal area, the result was:
| 1. | Increase in diversity of invertebrates |
| 2. | Extinction of many invertebrate species |
| 3. | Inability of the Pisaster to enter the area again |
| 4. | Replacement of Pisaster by other starfish |
Subtopic: Population Interactions: Predation |
86%
From NCERT
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Predators in nature are ‘prudent’ because:
| 1. | This keeps their own population in check |
| 2. | Prudence keeps their hunting skills up to date |
| 3. | Lack of prudence can lead to their own extinction |
| 4. | This helps in the maintenance of genetic diversity in their gene poll |
Subtopic: Population Interactions: Predation |
61%
From NCERT
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Camouflage is:
| 1. | Cryptic coloration | 2. | Aposematic coloration |
| 3. | Incidental coloration | 4. | Dispersive coloration |
Subtopic: Population Interactions: Predation |
78%
From NCERT
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