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Q. No.Which of the following is not usually an adaptation for a parasitic mode of life?
1.
Loss of unnecessary sense organs
2.
Presence of adhesive organs or suckers
3.
Loss of the digestive system
4.
Low reproductive capacity
Subtopic: Population Interactions: Parasitism |
86%
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The human liver fluke depends on two intermediate hosts that are:
| 1. | A crustacean and a fish |
| 2. | A snail and a fish |
| 3. | An echinoderm and a fish |
| 4. | Fishes of two different species |
Subtopic: Population Interactions: Parasitism |
88%
From NCERT
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Flowers and their insect pollinators must undergo co-evolution because:
| 1. | Without pollinators plants may get extinct |
| 2. | Plants have to reward the pollinators |
| 3. | The relationship must be safeguarded against cheaters |
| 4. | Insects are the major pollinators of plants |
Subtopic: Population Interactions: Coevolution |
From NCERT
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The pollinator of the fig plant:
| I: | Uses fruit as an oviposition site |
| II: | Uses seeds for nourishing its larvae |
| 1. | I only | 2. | II only |
| 3. | Both I and II | 4. | None |
Subtopic: Population Interactions: Commensalism, Protocooperation & Mutualism |
86%
From NCERT
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Autecology is the:
| 1. | Relation of heterogeneous populations to their environment |
| 2. | Relation of an individual to its environment |
| 3. | Relation of a community to its environment |
| 4. | Relation of a biome to its environment |
Subtopic: Introduction to Ecology |
63%
From NCERT
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Ecotone is:
1. A polluted area
2. The bottom of a lake
3. A zone of transition between two communities
4. A zone of developing community
Subtopic: Introduction to Ecology |
85%
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Biosphere is:
| 1. | A component in the ecosystem |
| 2. | Composed of the plants present in the soil |
| 3. | Life in the outer space |
| 4. | Composed of all living organisms present on earth which interact with the physical environment |
Subtopic: Introduction to Ecology | Introduction to the Chapter |
90%
From NCERT
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The ecological niche is:
| 1. | The surface area of the ocean |
| 2. | An ecologically adapted zone |
| 3. | The physical position and functional role of a species within the community |
| 4. | Formed of all plants and animals living at the bottom of a lake |
Subtopic: Introduction to Ecology | Introduction to the Chapter |
89%
From NCERT
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According to Allen’s Rule, mammals from colder climates have:
1. Shorter ears and longer limbs
2. Longer ears and shorter limbs
3. Longer ears and longer limbs
4. Shorter ears and shorter limbs
Subtopic: Adaptations (OLD NCERT) |
86%
From NCERT
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Salt concentration (Salinity) of the sea measured in parts per thousand is:
1. 10-15
2. 30-70
3. 0-5
4. 30-35
Subtopic: Response of Organisms to Abiotic Factors (OLD NCERT) |
78%
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