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Q. No.Consider the given two statements
Assertion (A):
The female Anopheles mosquito is not considered a parasite.
Reason (R):
Only the male Anopheles mosquitoes bite and spread diseases in humans.
1.
Both (A) and (R) are True and (R) correctly explains (A).
2.
Both (A) and (R) are True but (R) does not correctly explain (A).
3.
(A) is True, (R) is False.
4.
(A) is False, (R) is False.
Subtopic: Population Interactions: Parasitism |
68%
From NCERT
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Consider the two statements:
1. Only Statement I is correct.
2. Only Statement II is correct.
3. Both Statement I and Statement II are incorrect.
4. Both Statement I and Statement II are correct.
| Statement I: | Most birds and mammals breed many times during their lifetime. |
| Statement II: | Most birds and mammals produce a small number of large sized offspring. |
1. Only Statement I is correct.
2. Only Statement II is correct.
3. Both Statement I and Statement II are incorrect.
4. Both Statement I and Statement II are correct.
Subtopic: Life History Variations |
84%
From NCERT
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Consider the given two statements:
| Assertion (A): | A population, growing in natural environmental conditions, remains relatively stable in size before it starts to grow exponentially. |
| Reason (R): | During this phase, the organisms are adapting to the environment, synthesizing necessary enzymes, and preparing for rapid growth. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 3. | (A) is True, (R) is False. |
| 4. | (A) is False, (R) is True. |
Subtopic: Population Dynamic |
87%
From NCERT
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All species have evolved to adopt the most effective reproductive strategy for themselves. For example, pelagic fish produce:
1. a large number of small-sized offspring
2. a small number of small-sized offspring
3. a large number of large-sized offspring
4. a small number of large-sized offspring
Subtopic: Life History Variations |
93%
From NCERT
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Subtopic: Population Interactions: Commensalism, Protocooperation & Mutualism |
91%
From NCERT
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Why is an orchid growing as an epiphyte on a mango tree not considered parasitism?
| 1. | Because the orchid harms the mango tree by extracting nutrients. |
| 2. | Because the orchid provides essential nutrients to the mango tree. |
| 3. | Because the orchid does not extract nutrients from the mango tree, merely using it as a physical support. |
| 4. | Because the mango tree derives nutrients from the orchid. |
Subtopic: Population Interactions: Commensalism, Protocooperation & Mutualism |
91%
From NCERT
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Consider the given two statements:
| Assertion (A): | The logistic growth curve is more realistic for natural populations than the exponential growth curve. |
| Reason (R): | It considers environmental resistance and carrying capacity, which limit population size. |
| 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: Logistic Growth Model |
96%
From NCERT
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Consider the given two statements:
| Assertion (A): | Mycorrhizae are a type of symbiotic relationship between fungal hyphae and plant roots, enhancing nutrient absorption for the plant. |
| Reason (R): | The fungal hyphae increase the surface area of the plant roots, allowing them to absorb more water and minerals from the soil. |
| 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: Commensalism, Protocooperation & Mutualism |
87%
From NCERT
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Match the following population interactions with their effects on species A and B:
Codes:
| Column I | Column II | ||
| A | Predation | P | A (+), B (−) |
| B | Amensalism | Q | A (+), B (0) |
| C | Mutualism | R | A (+), B (+) |
| D | Commensalism | S | A (−), B (0) |
| A | B | C | D | |
| 1. | P | S | Q | R |
| 2. | Q | P | S | R |
| 3. | P | S | R | Q |
| 4. | S | P | Q | R |
Subtopic: Population Interactions: Predation | Population Interactions: Amensalism | Population Interactions: Commensalism, Protocooperation & Mutualism |
95%
From NCERT
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Two species of fish, X and Y, coexist in a lake. Species X feeds on plankton, while species Y is a carnivore that preys on both plankton and fish X. Which of the following statements about the interaction between these two species is MOST LIKELY true?
| 1. | Species X has a competitive advantage over species Y for food. |
| 2. | Species X and Y exhibit a predator-prey relationship. |
| 3. | An increase in the population of species X would benefit the population of species Y. |
| 4. | Species Y is likely to be a K-selected species due to its predatory behaviour. |
Subtopic: Population Interactions: Predation |
55%
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