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Q. No.Cornell studied two barnacles – Chthamalus and Balanus. Chthamalus is usually found higher on the rocks. He removed Balanus from the rocks at several sites.
The result showed that Chthamalus spread into the region formerly occupied by Balanus.
The correct conclusion will be:
1.
Interspecific competition makes the realized niche of Chthamalus much larger than its fundamental niche.
2.
Interspecific competition makes the realized niche of Chthamalus much smaller than its fundamental niche.
3.
Interspecific competition makes the realized niche of Balanus much larger than its fundamental niche.
4.
Interspecific competition makes the realized niche of Balanus much smaller than its fundamental niche.
Subtopic: Population Interactions: Competition |
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The number of correct statements amongst the given is:
| Statement I: | Parasitism has evolved in many taxonomic groups from plants to higher vertebrates. |
| Statement II: | Many parasites have evolved to be host-specific and both tend to co-evolve. |
| Statement III: | All parasites have only one primary and one intermediate host. |
| Statement IV: | Only a few of the parasites harm their hosts. |
| 1. | 1 | 2. | 2 |
| 3. | 3 | 4. | 4 |
Subtopic: Population Interactions: Parasitism |
73%
From NCERT
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The given picture shows Cascuta, commonly found growing on hedge plants. Such relationship is also exemplified by:
| I: | Lice on humans and ticks on dogs |
| II: | Marine fish infested with ectoparasitic copepods |
| III: | Female Anopheles biting human beings |
| IV: | Tapeworm in the human alimentary canal |
| 1. | Only I and II | 2. | Only III and IV |
| 3. | Only I and III | 4. | Only II and IV |
Subtopic: Population Interactions: Parasitism |
79%
From NCERT
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Consider the two statements given below:
1. Only Statement I is correct
2. Only Statement II is correct
3. Both Statement I and Statement II are correct
4. Neither Statement I nor Statement II is correct
| Statement I: | The morphological and anatomical features of endoparasites are greatly simplified but their reproductive potential is very high. |
| Statement II: | Unlike ectoparasites, endoparasites live inside the host body at different sites and their life cycles are more complex. |
2. Only Statement II is correct
3. Both Statement I and Statement II are correct
4. Neither Statement I nor Statement II is correct
Subtopic: Population Interactions: Parasitism |
83%
From NCERT
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The given picture shows the symbiotic relationship between an anemone (Heteractis magnifica) and a clownfish (Amphirion ocellaris).
Which of the following options is correct regarding the two statements given above?
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | The anemone provides the clownfish with protection and shelter |
| II: | The clownfish provides the anemone nutrients in the form of waste while also scaring off potential predator fish |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Population Interactions: Commensalism, Protocooperation & Mutualism |
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The given picture shows cattle egret and the cattle in close association. This is an example of:
| 1. | Competition | 2. | Commensalism |
| 3. | Mutualism | 4. | Parasitism |
Subtopic: Population Interactions: Commensalism, Protocooperation & Mutualism |
91%
From NCERT
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Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
In the light of the above statements, choose the most appropriate answer from the options given below :
| Assertion (A): | Plant-animal interactions often involve co-evolution of the mutualists. |
| Reason (R): | The mutually beneficial system should be safeguarded against ‘cheaters’. |
| 1. | Both (A) and (R) are True but (R) does not explain (A). |
| 2. | Both (A) and (R) are True and (R) correctly explains (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Population Interactions: Commensalism, Protocooperation & Mutualism |
51%
From NCERT
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The picture shows mutual relationship between the fig tree and the wasp.
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | Many species of fig trees can only be pollinated by their ‘partner’ wasp species and no other species. |
| II: | The female wasp does not derive any benefit from this relationship. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Population Interactions: Commensalism, Protocooperation & Mutualism |
85%
From NCERT
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The picture shows a bee pollinating the Mediterranean orchid, Ophrys.
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. II is correct but I is incorrect.
| I: | This exemplifies the operation of co-evolution between the bee and the flower. |
| II: | All orchids offer rewards to their specific pollinators. |
2. Both I and II are correct but II does not explain I.
3. I is correct but II is incorrect.
4. II is correct but I is incorrect.
Subtopic: Population Interactions: Commensalism, Protocooperation & Mutualism |
60%
From NCERT
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The age pyramid with broad base indicates:
1. high percentage of old individuals
2. low percentage of young individuals
3. a stable population
4. high percentage of young individuals
1. high percentage of old individuals
2. low percentage of young individuals
3. a stable population
4. high percentage of young individuals
Subtopic: Age Pyramid |
82%
From NCERT
NEET - 2013
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