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Q. No.How many of the given statements are true?
I:
Parasites that feed on the external surface of the host organism are called ectoparasites.
II:
Anopheles is an ectoparasite.
III:
The life cycles of endoparasites are more complex because of their extreme specialisation.
1. 0
2. 1
3. 2
4. 3
Subtopic: Population Interactions: Parasitism |
72%
From NCERT
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At which level of the biological organisation does the study of ecology typically start?
| 1. | Organism | 2. | Population |
| 3. | Biological community | 4. | Ecosystem |
Subtopic: Introduction to Ecology | Organisms and its Environment |
67%
From NCERT
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If a new habitat is just being colonised, which of the following may contribute most to the population growth rates?
| 1. | Mortality | 2. | Emigration |
| 3. | Natality | 4. | Immigration |
Subtopic: Population Characters: Natality & Mortality |
87%
From NCERT
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Herbivores, in a broad ecological context, are not very different from:
| 1. | predators | 2. | parasites |
| 3. | commensals | 4. | decomposers |
Subtopic: Population Interactions: Predation |
86%
From NCERT
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In Mediterranean orchid, Ophrys:
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: | One petal of its flower bears an uncanny resemblance to the female of the pollinator bee in size, colour and markings. |
| II: | The orchid flower co-evolves to maintain the resemblance of its petal to the female bee. |
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 |
94%
From NCERT
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Only one species benefit and the interaction is detrimental to the other species in:
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
| I: | Predation |
| II: | Commensalism |
| III: | Parasitism |
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
Subtopic: Population Dynamic |
85%
From NCERT
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If 4 individuals in a laboratory population of 40 fruitflies are added through reproduction during a week, the death rate in the population during that period is:
1. 4 individuals per fruitfly per week.
2. 0.4 individuals per fruitfly per week.
3. 40 individuals per fruitfly per week.
4. 0.1 individuals per fruitfly per week.
1. 4 individuals per fruitfly per week.
2. 0.4 individuals per fruitfly per week.
3. 40 individuals per fruitfly per week.
4. 0.1 individuals per fruitfly per week.
Subtopic: Population Attributes |
84%
From NCERT
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The human liver fluke:
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: | is a member of Platyhelminthes. |
| II: | depends on two intermediate hosts (a snail and a fish) to complete its life cycle. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Population Interactions: Parasitism |
88%
From NCERT
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Consider the two statements:
| I: | In ecology, the term “niche” describes the role an organism plays in a community. |
| II: | A species’ niche encompasses both the physical and environmental conditions it requires and the interactions it has with other species. |
1. I is correct; II is correct
2. I is correct; II is incorrect
3. I is incorrect; II is correct
4. I is incorrect; II is incorrect
Subtopic: Introduction to Ecology | Organisms and its Environment |
88%
From NCERT
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Subtopic: Population Interactions: Commensalism, Protocooperation & Mutualism |
91%
From NCERT
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