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Q. No.
Given below are two statements:
Assertion (A):
Ten species of invertebrates became extinct within a year when all the starfish were removed from an enclosed intertidal zone.
Reason (R):
Starfish is an important predator which reduces intensity of competition among invertebrates
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: Population Interactions: Predation |
85%
From NCERT
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Given below are two statements:
| Assertion (A): | Some species of insects and frogs are cryptically coloured to avoid being detected easily by the predator. |
| Reason (R): | Monarch butterfly develops a special chemical in its body by feeding on a poisonous weed at caterpillar stage. |
| 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: Population Interactions: Predation |
83%
From NCERT
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Given below are two statements:
| Assertion (A): | Plants can avoid their predators like phytophagous insects. |
| Reason (R): | Plants have evolved an astonishing variety of morphological and chemical defence against herbivores |
| 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: Population Interactions: Predation |
73%
From NCERT
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Given below are two statements:
| Assertion (A): | Competition leads to decrease in the fitness of one species in the presence of another species |
| Reason (R): | Competing species either compete for same resources or one species reduces feeding efficiency of another species. |
| 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: Population Interactions: Competition |
76%
From NCERT
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Given below are two statements:
| Assertion (A): | In the presence of competitively superior species, the distribution of another species is restricted to a small geographical area. |
| Reason (R): | Competitively superior species reduces the intrinsic rate of increase of another species. |
| 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: Population Interactions: Competition |
84%
From NCERT
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Given below are two statements:
| Assertion (A): | The cattle egrets and grazing cattles show commensalism. |
| Reason (R): | Egrets catch those insects which are found due to cattle grazing. |
| 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: Population Interactions: Commensalism, Protocooperation & Mutualism |
82%
From NCERT
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Read the following statements and select the correct option.\
1. Only statement A is correct
2. Only statement B is correct
3. Both statements are correct
4. Both statements are incorrect
| A: | Desert lizards lack the physiological ability to deal with the high temperatures of their habitat |
| B: | Some species are capable of burrowing into the soil to hide and escape from the above ground heat. |
1. Only statement A is correct
2. Only statement B is correct
3. Both statements are correct
4. Both statements are incorrect
Subtopic: Adaptations (OLD NCERT) |
72%
From NCERT
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You never see any cattle or goats browsing on Calotropis because
1. They produce highly poisonous cardiac glycosides
2. They have spines instead of leaves
3. They are distasteful to their herbivores
4. They are too long in heights to reach by herbivores
1. They produce highly poisonous cardiac glycosides
2. They have spines instead of leaves
3. They are distasteful to their herbivores
4. They are too long in heights to reach by herbivores
Subtopic: Population Interactions: Predation |
90%
From NCERT
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Many desert plants have different adaptations to grow in arid regions. Which of the following is not an adaptation w.r.t. such plants?
1. Thick cuticle on leaf surface
2. Stomata arranged in deep pits
3. Special photosynthetic pathway called CAM
4. Broad leaves to increase photosynthetic efficiency
1. Thick cuticle on leaf surface
2. Stomata arranged in deep pits
3. Special photosynthetic pathway called CAM
4. Broad leaves to increase photosynthetic efficiency
Subtopic: Adaptations (OLD NCERT) |
77%
From NCERT
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Select the organism which shows the below graph for its homeostasis.
1. Humans
2. Nearly all plants
3. Mammals-
4. All birds
1. Humans
2. Nearly all plants
3. Mammals-
4. All birds
Subtopic: Response of Organisms to Abiotic Factors (OLD NCERT) |
63%
From NCERT
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