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Q. No.Which one of the following is an appropriate example of 'sexual deceit'?
1. Female wasp and fig
2. Cuckoo and crow
3. Ophrys and bumblebee
4. Sea anemone and clown fish
1. Female wasp and fig
2. Cuckoo and crow
3. Ophrys and bumblebee
4. Sea anemone and clown fish
Subtopic: Population Interactions: Commensalism, Protocooperation & Mutualism |
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Level 2: 60%+
NEET - 2026
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Which of the following equations depicts Verhulst-Pearl logistic population growth ?
1. \(\dfrac{dN}{dt} = rN \left(\frac{K-N}{K}\right)\)
2. \(\dfrac{dN}{dt} = rN \left(\frac{K+N}{K}\right)\)
3. \(\dfrac{dN}{dt} = rN \left(\frac{K}{K-N}\right)\)
4. \(\dfrac{dN}{dt} = rN \left(\frac{K-N}{N}\right)\)
1. \(\dfrac{dN}{dt} = rN \left(\frac{K-N}{K}\right)\)
2. \(\dfrac{dN}{dt} = rN \left(\frac{K+N}{K}\right)\)
3. \(\dfrac{dN}{dt} = rN \left(\frac{K}{K-N}\right)\)
4. \(\dfrac{dN}{dt} = rN \left(\frac{K-N}{N}\right)\)
Subtopic: Population: Logistic Growth Model |
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Level 1: 80%+
NEET - 2026
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Choose the correct statements regarding population interactions between two species.
Choose the correct answer from the options given below:
| A. | In both parasitism and commensalism, only one species benefits and the other species is harmed. |
| B. | Both species benefit in mutualism. |
| C. | Both species benefit in commensalism. |
| D. | In parasitism, only one species benefits and the other species is harmed |
| E. | In amensalism, one species is harmed and the other is unaffected. |
| 1. | A and D only | 2. | A and B only |
| 3. | B and E only | 4. | B, D and E only |
Subtopic: Miscellaneous |
81%
Level 1: 80%+
NEET - 2026
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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): | Abingdon tortoise in Galapagos islands became extinct within a decade after goats were introduced. |
| Reason (R): | Goats were more efficient at browsing than Abingdon tortoise. |
In the light of the above statements, choose the most appropriate answer from the options given below:
| 1. | (A) is not correct but (R)is correct |
| 2. | Both (A) and (R) are correct and (R) is the correct explanation of (A) |
| 3. | Both (A) and (R) are correct but (R) is not the correct explanation of (A) |
| 4. | (A) is correct but (R) is not correct |
Subtopic: Population Interactions: Competition |
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NEET - 2026
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Consider a population of 10 million cells. Given the per-capita birth rate of 0.002 (per unit time) and the per-capita death rate of 0.002 (per unit time), the expected number of cells after 10 generations is ___________.
1. 100 million
2. 1 million
3. 5 million
4. 10 million
1. 100 million
2. 1 million
3. 5 million
4. 10 million
Subtopic: Population Characters: Density | Population Characters: Natality & Mortality |
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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): | The logistic growth model of populations is considered more realistic than the exponential growth model. |
| Reason (R): | Resources are finite. |
In the light of the above statements, choose the most appropriate answer from the options given below :
| 1. | (A)is not correct but (R) is correct |
| 2. | Both (A)and (R) are correct and (R) is the correct explanation of (A) |
| 3. | Both (A) and (R) are correct but (R) is not the correct explanation of (A) |
| 4. | (A) is correct but (R) is not correct |
Subtopic: Population: Logistic Growth Model |
96%
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Match List-I with List-II:
Choose the correct answer from the options given below:
1. A-III, B-I, C-II, D-IV
2. А-III, B-IV, C-II, DI
3. A-I, B-II, C-III, D-IV
4. A-II, B-I, C-IV, D-III
| List-I | List-II | ||
| A. | Both species are harmed | I. | Predation |
| B. | One species is harmed and the other is benefited | II. | Mutualism |
| C. | Both species are benefited | III. | Competition |
| D. | One is benefited while the other has no effect | IV. | Commensalism |
Choose the correct answer from the options given below:
1. A-III, B-I, C-II, D-IV
2. А-III, B-IV, C-II, DI
3. A-I, B-II, C-III, D-IV
4. A-II, B-I, C-IV, D-III
Subtopic: Population Interactions: Competition | Population Interactions: Predation | Population Interactions: Commensalism, Protocooperation & Mutualism |
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NEET - 2026
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Epiphytes, that are growing on the mango branch, is an explanation of which of the following?
| 1. | Predation | 2. | Amensalism |
| 3. | Commensalism | 4. | Mutualism |
Subtopic: Population Interactions: Commensalism, Protocooperation & Mutualism |
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NEET - 2025
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Given below are two statements :
In the light of the above statements, choose the most appropriate answer from the options given below:
| Statement I: | Fig fruit is a non-vegetarian fruit as it has enclosed fig wasps in it. |
| Statement II: | Fig wasp and fig tree exhibit mutual relationship as fig wasp completes its life cycle in fig fruit and fig fruit gets pollinated by fig wasp. |
In the light of the above statements, choose the most appropriate answer from the options given below:
| 1. | Statement I is correct but Statement II is incorrect |
| 2. | Statement I is incorrect but Statement II is correct |
| 3. | Both Statement I and Statement II are correct |
| 4. | Both Statement I and Statement II are incorrect |
Subtopic: Population Interactions: Commensalism, Protocooperation & Mutualism |
Level 4: Below 35%
NEET - 2025
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Which one of the following equations represent the Verhulst-Pearl Logistic Growth of population?
| 1. | \(\frac{d \mathrm{~N}}{d t}=r N\left(\frac{N-K}{N}\right) \) | 2. | \(\frac{d N}{d t}=N\left(\frac{r-K}{K}\right) \) |
| 3. | \(\frac{d N}{d t}=r\left(\frac{K-N}{K}\right) \) | 4. | \(\frac{d N}{d t}=r N\left(\frac{K-N}{K}\right)\) |
Subtopic: Population: Logistic Growth Model |
70%
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