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Q. No.
Assertion (A):
Respiration occurs through the general body surface in Cephalochordates.
Reason (R):
Digestive tract is incomplete in Cephalochordates.
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 Chordata |
63%
Level 2: 60%+
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| Assertion (A) : | Birds possess moist skin. |
| Reason (R) : | Birds possess oil glands throughout their body. |
| 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: Super Class Pisces & its General Characteristics |
78%
Level 2: 60%+
Hints
| Assertion (A) : | The scales of reptiles and fishes are similar in origin. |
| Reason (R) : | All the chordates lack kidneys. |
| 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 | Study of Aves & Mammals |
69%
Level 2: 60%+
Hints
Assertion (A) : Tapeworms absorb digested food by its body surface.
Reason (R) : Tapeworms possess digestive organs.
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.
Reason (R) : Tapeworms possess digestive organs.
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 |
65%
Level 2: 60%+
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Given below are two statements:
| Assertion (A): | All birds, except the ones like koel (cuckoo), build nests for retiring and taking rest during night time. |
| Reason (R): | Koel lays its eggs in the nests of tailor bird. |
| 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 |
Level 3: 35%-60%
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Given below are two statements:
| Assertion (A): | Bats and whales are classified as mammals. |
| Reason (R): | Bats and whales have four-chambered heart. |
| 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 |
76%
Level 2: 60%+
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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.
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%+
Hints
| 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%+
Hints
| 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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