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Q. No.
Assertion (A):
Among red, green and brown algae, the red algae are found in the deepest ocean.
Reason (R):
Red algae possess phycobilins, which can absorb the blue and green light that penetrates the deepest water.
1.
Both (A) and (R) are true and (R) is the correct explanation of (A)
2.
Both (A) and (R)are true but (R) is not the correct explanation of (A)
3.
(A)is true but (R) is false
4.
Both (A) and (R) are false
Subtopic: Introduction to Ecology |
64%
Level 2: 60%+
Hints
| Assertion: | The triangular age pyramid is a graphic representation of a young or growing population. |
| Reason: | An age pyramid is a graphic representation of proportion of various age group of population. |
| 1. | Both assertion and reason are true and the reason is the correct explanation of the assertion |
| 2. | Both assertion and reason are true but the reason is not the correct explanation of the assertion |
| 3. | Assertion is true but reason is false |
| 4. | Both assertion and reason are false |
Subtopic: Population Characters: Density |
65%
Level 2: 60%+
Hints
| Assertion (A): | The Mediterranean orchid Ophyrus employs 'sexual deceit' to get pollinated by some male bees. |
| Reason (R): | Plant-animal interactions never involve co-evolution. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A) |
| 2. | Both (A) and (R)are true but (R) is not the correct explanation of (A) |
| 3. | (A)is true but (R) is false |
| 4. | Both (A) and (R) are false |
Subtopic: Introduction to Ecology |
84%
Level 1: 80%+
Hints
Read the following statements:
Which of the above statements are correct?
1. (ii), (iii) and (iv)
2. (i), (ii) and (iii)
3. (ii) and (iv)
4. (i), (iii) and (v)
| (i) | Lactic acid bacteria produce acids that coagulate and partially digest the milk protein during curd making |
| (ii) | Curd is less nutritious than milk |
| (iii) | Cheese is partially degraded concentration of milk fat and casein |
| (iv) | Large holed swiss cheese is ripened by fungi propionibacterium sharmanii |
| (v) | Probiotics are live microbial food supplements |
Which of the above statements are correct?
1. (ii), (iii) and (iv)
2. (i), (ii) and (iii)
3. (ii) and (iv)
4. (i), (iii) and (v)
Subtopic: Population Interactions: Amensalism |
83%
Level 1: 80%+
Hints
Read the following statements:
Which of the above statements are correct?
1. (ii), (iv) and (v)
2. (i) and (iii)
3. (i), (ii) and (iii)
4. (ii) and (iii)
| (i) | Success of mammals on earth is mainly due to their ability to maintain a constant body temperature |
| (ii) | Migration is restricted to animals only. In plants, even the propagules (spores and seeds) cannot migrate |
| (iii) | Diapause is a stage of suspended development in many zooplanktons |
| (iv) | Most of the animals can maintain internal homeostasis |
| (v) | In conformers, the body temperature changes with the ambient temperature but the osmotic concentration of the body fluids does not change with that of ambient water osmotic concentration |
1. (ii), (iv) and (v)
2. (i) and (iii)
3. (i), (ii) and (iii)
4. (ii) and (iii)
Subtopic: Population Characters: Age Structure & Migration |
63%
Level 2: 60%+
Hints
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Assertion(A): Ecology is a thread that gives us a holistic perspective to Biology.
Reason(R): The essence of biological understanding is to know how organisms, while remaining an individual, interact with other organisms and physical habitats as a group.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Reason(R): The essence of biological understanding is to know how organisms, while remaining an individual, interact with other organisms and physical habitats as a group.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: Introduction to Ecology |
Level 3: 35%-60%
Hints
Assertion(A): An individual may have births and deaths, but a population has birth rates and death rates.
Reason(R): In a population, the rates are expressed as change in numbers (increase or decrease) with respect to members of the population.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Reason(R): In a population, the rates are expressed as change in numbers (increase or decrease) with respect to members of the population.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: Population Dynamic |
50%
Level 3: 35%-60%
Hints
Assertion(A): Population ecology is an important area of ecology.
Reason(R): Evolutionary changes take place at the population level.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Reason(R): Evolutionary changes take place at the population level.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: Introduction to Ecology |
63%
Level 2: 60%+
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Assertion(A): Population ecology is an important area of ecology.
Reason(R): it links ecology to population genetics and diversity.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Reason(R): it links ecology to population genetics and diversity.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: Introduction to Ecology |
Level 4: Below 35%
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Assertion(A): When certain exotic species are introduced into a geographical area, they become invasive and start spreading fast.
Reason(R): The invaded land does not have its natural competitors.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Reason(R): The invaded land does not have its natural competitors.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: Population Interactions: Competition |
Level 3: 35%-60%
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