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Q. No.
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Assertion(A) : Tapeworms, round worms and pin worms are endoparasites of human intestine.
Reason (R) : Improperly cooked food is the source of all intestinal infections.
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: Phylum Ctenophora | Phylum Aschelminthes | Phylum Platyhelminthes |
Level 3: 35%-60%
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Given below are two statements:
| Assertion (A): | The duck-billed platypus and the spiny ant-eater, both are egg laying animals yet they are grouped under mammals. |
| Reason (R): | Both of them have seven cervical vertebrae and 12 pairs of cranial nerves. |
| 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: Study of Aves & Mammals |
66%
Level 2: 60%+
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| Assertion (A) : | In Mollusca, feathers like gills are present in the mantle cavity. |
| Reason (R) : | These gills have respiratory and excretory functions. |
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: Phylum Mollusca |
61%
Level 2: 60%+
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| Assertion (A): | Claspers are present in males of the class Chondrichthyes. |
| Reason (R): | Claspers assist copulation. |
| 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: Comparative study of Cartilagenous & Bony Fishes | Class Chondrichthyes |
Level 3: 35%-60%
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Given below are two statements:
| Assertion (A): | The organisms of Platyhelminths are usually hermaphrodites. |
| Reason (R): | These organisms possess internal as well as external fertilization. |
| 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: Phylum Platyhelminthes |
69%
Level 2: 60%+
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Given below are two statements:
| Assertion (A): | Teeth of mammals are heterodont. |
| Reason (R): | Mammals possess more than a single tooth morphology. |
| 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: Study of Aves & Mammals |
75%
Level 2: 60%+
Hints
| Assertion (A) : | Reptiles are poikilotherms. |
| Reason (R) : | Reptiles possess eggs with shells which helped them to adapt in land environment. |
| 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: Study of Reptilia |
80%
Level 1: 80%+
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Given below are two statements:
| Assertion (A): | Echinoderms possess an endoskeleton of calcareous ossicles. |
| Reason (R): | These organisms are marine or freshwater dwellings. |
| 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: Phylum Echinodermata |
68%
Level 2: 60%+
Hints
Consider the given two statements:
| Assertion (A): | Balanoglossus possess external fertilization. |
| Reason(R): | Saccoglossus undergo direct development during their life cycle. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A) |
| 2. | Both (A) and (R) are True and (R) does not correctly explain (A) |
| 3. | (A) is True, (R) is False |
| 4. | (A) is False, (R) is False |
Subtopic: Phylum Hemichordata |
68%
Level 2: 60%+
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| Assertion (A): | Aschelminths and Annelids possess bilateral symmetry. |
| Reason (R): | Both Aschelminths and Annelids are coelomates |
| 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: Phylum Annelida | Phylum Arthropoda |
80%
Level 1: 80%+
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