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Q. No.Plants offer rewards to animals in the form of pollen and nectar and the animals facilitate the pollination process. This is an example of:
1.
Amensalism
2.
Competition
3.
Commensalism
4.
Mutualism
Subtopic: Population Interactions: Commensalism, Protocooperation & Mutualism |
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For chemical defense against herbivores, Calotropis has
| 1. | Cardiac glycosides | 2. | strychnine |
| 3. | toxic ricin | 4. | distasteful quinine |
Subtopic: Population Interactions: Predation |
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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
1. 10
2. 9
3. 25
4. 15
Subtopic: Population Characters: Natality & Mortality |
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Match List I with List II.
Choose the correct answer from the options given below:
| List I | List II | ||
| A. | Logistic growth | I. | Unlimited resource availability condition |
| B. | Exponential growth | II. | Limited resource availability condition |
| C. | Expanding age pyramid | III. | The percent individuals of pre-reproductive age is largest followed by reproductive and post reproductive age groups |
| D. | Stable age pyramid | IV. | The percent individuals of pre-reproductives and reproductive age group are same |
| Options: | A | B | C | D |
| 1. | II | IV | III | I |
| 2. | II | I | III | IV |
| 3. | II | III | I | IV |
| 4. | II | IV | I | III |
Subtopic: Population: Exponential Growth Model | Population: Logistic Growth Model | Age Pyramid |
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Match List I with List II
Choose the correct answer from the options given below:
| List I (Interacting species) | List II (Name of Interaction) | ||
| A. | A Leopard and a Lion in a Forest/grassland | I. | Competition |
| B. | A Cuckoo laying an egg in a Crow's nest | II. | Brood parasitism |
| C. | Fungi and root of a higher plant mycorrhizae | I. | Mutualism |
| D. | A cattle egret and a Cattle in a field | IV. | Commensalism |
Choose the correct answer from the options given below:
| Options: | A | B | C | D |
| 1. | II | III | I | IV |
| 2. | I | II | III | IV |
| 3. | I | II | IV | III |
| 4. | III | IV | I | II |
Subtopic: Population Interactions: Competition | Population Interactions: Predation | Population Interactions: Parasitism | Population Interactions: Amensalism | Population Interactions: Commensalism, Protocooperation & Mutualism |
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Given below are two statements:
In the light of the above statements, choose the correct answer from the options given below:
1. Statement I is incorrect but Statement II is correct.
2. Both Statement I and Statement II are correct.
3. Both Statement I and Statement II are incorrect.
4. Statement I is correct but Statement II is incorrect.
| Statement I: | Gause's 'Competitive Exclusion Principle' states that two closely related species competing for the same resources cannot co-exist indefinitely and competitively inferior one will be eliminated eventually. |
| Statement II: | In general, carnivores are more adversely affected by competition than herbivores. |
In the light of the above statements, choose the correct answer from the options given below:
1. Statement I is incorrect but Statement II is correct.
2. Both Statement I and Statement II are correct.
3. Both Statement I and Statement II are incorrect.
4. Statement I is correct but Statement II is incorrect.
Subtopic: Population Interactions: Competition |
67%
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Match List I with List II
Choose the correct answer from the options given below:
| List I (Interaction) |
List II (Species A and B) |
||
| A. | Mutualism | I. | +(A), O(B) |
| B. | Commensalism | II. | –(A), O(B) |
| C. | Amensalism | III. | +(A), –(B) |
| D. | Parasitism | IV | +(A), +(B) |
Choose the correct answer from the options given below:
| Options: | A | B | C | D |
| 1. | III | I | IV | II |
| 2. | IV | II | I | II |
| 3. | IV | I | II | III |
| 4. | IV | III | I | II |
Subtopic: Population Interactions: Competition | Population Interactions: Predation | Population Interactions: Parasitism | Population Interactions: Commensalism, Protocooperation & Mutualism |
89%
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Two butterfly species are competing for the same nectar of a flower in a garden. To survive and coexist together, they may avoid competition in the same garden by:
1. feeding at the same time.
2. choosing different foraging patterns.
3. increasing time spent on attacking each other.
4. predating on each other.
1. feeding at the same time.
2. choosing different foraging patterns.
3. increasing time spent on attacking each other.
4. predating on each other.
Subtopic: Population Interactions: Competition |
90%
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A population with finite resources shows a logistic growth curve where the correct sequence of events will be:
| 1. | Stationary phase → Acceleration phase → Lag phase → Asymptote |
| 2. | Acceleration phase → Deceleration → Asymptote |
| 3. | Acceleration phase → Leg phase → Stationary phase |
| 4. | Lag phase → Acceleration phase → Deceleration → Asymptote |
Subtopic: Population: Logistic Growth Model |
78%
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Which of the following is the correct equation of exponential growth?
1. \(N_t = N_0 ~e^{rnt}\)
2. \(N_t = N_0 ~e^{rpt}\)
3. \(N_t = N_0 ~e^{rst}\)
4. \(N_t = N_0 ~e^{rt}\)
Subtopic: Population: Exponential Growth Model |
93%
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