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Q. No.Consider the given two statements:
Assertion (A):
Adult echinoderms exhibit radial symmetry.
Reason (R):
Adult echinoderms are diploblastic.
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: Phylum Echinodermata |
88%
From NCERT
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Match the animal classes in Column I with their primary characteristics in Column II:
Codes:
| Column I | Column II | ||
| A | Reptilia | P | Egg spawning on water surface |
| B | Amphibia | Q | Presence of mammary glands |
| C | Aves | R | Skin covered with scales or scutes |
| D | Mammalia | S | Endothermic with feathers |
Codes:
| A | B | C | D | |
| 1. | R | P | Q | S |
| 2. | Q | P | R | S |
| 3. | R | P | S | Q |
| 4. | S | P | Q | R |
Subtopic: Study of Amphibians | Study of Reptilia | Study of Aves & Mammals |
97%
From NCERT
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Which of the following statements about animals belonging to the phylum Chordata is true?
| 1. | All chordates possess a notochord at some stage of their life cycle. |
| 2. | Chordates exclusively exhibit asexual reproduction. |
| 3. | Chordates lack a dorsal hollow nerve cord. |
| 4. | Chordates are exclusively aquatic organisms. |
Subtopic: Phylum Chordata |
95%
From NCERT
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Consider the following statements:
1. Only Statement I is correct.
2. Only Statement II is correct.
3. Both Statements are correct.
4. Neither Statements is correct.
| I: | All annelids are hermaphrodites. |
| II: | Bioluminescence is well-marked in cnidarians. |
1. Only Statement I is correct.
2. Only Statement II is correct.
3. Both Statements are correct.
4. Neither Statements is correct.
Subtopic: Phylum Coelenterata | Phylum Annelida |
70%
From NCERT
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Which of the following statements accurately highlights a significant difference between the class Osteichthyes and Chondrichthyes?
| 1. | Osteichthyes possess a swim bladder which aids in buoyancy, whereas Chondrichthyes lack a swim bladder and must constantly swim to avoid sinking. |
| 2. | Chondrichthyes have an operculum covering their gills, while Osteichthyes do not have any covering over their gill slits. |
| 3. | Both Osteichthyes and Chondrichthyes have a skeleton made entirely of bone, making them rigid and durable in aquatic environments. |
| 4. | Chondrichthyes exhibit external fertilization whereas Osteichthyes typically display internal fertilization mechanisms. |
Subtopic: Comparative study of Cartilagenous & Bony Fishes | Class Chondrichthyes | Class Osteichthyes |
92%
From NCERT
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Which statement correctly differentiates between Urochordates and Cephalochordates?
| 1. | Urochordates retain their notochord throughout their life, whereas Cephalochordates lose their notochord during the larval stage. |
| 2. | Cephalochordates, such as lancelets, retain a notochord extending the full length of their body into adulthood, whereas Urochordates, like tunicates, only possess a notochord during their larval stage. |
| 3. | Both Urochordates and Cephalochordates exhibit a complex nervous system comparable to that of higher vertebrates. |
| 4. | Urochordates are primarily terrestrial, whereas Cephalochordates are exclusively aquatic. |
Subtopic: Phylum Chordata |
90%
From NCERT
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Consider the given two statements:
| Assertion (A): | Frogs have a three-chambered heart. |
| Reason (R): | All vertebrates have a three 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. | (A) is False but (R) is True. |
Subtopic: Study of Amphibians |
96%
From NCERT
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What is a critical difference between Cnidaria and Ctenophora?
| 1. | Cnidarians are diploblastic, ctenophores are triploblastic. |
| 2. | Cnidarians are bilaterally symmetrical, ctenophores are radially symmetrical. |
| 3. | Cnidarians have a gastrovascular cavity, ctenophores do not. |
| 4. | Cnidarians possess cnidocytes, while ctenophores do not. |
Subtopic: Phylum Coelenterata | Phylum Ctenophora |
80%
From NCERT
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Match the following phyla with their characteristic features:
1. A-2, B-1, C-4, D-3
2. A-3, B-1, C-4, D-2
3. A-2, B-4, C-1, D-3
4. A-4, B-1, C-2, D-3
| Phylum (List I) |
Characteristic Feature (List II) |
||
| A. | Chordata | 1. | Spicules for support |
| B. | Porifera | 2. | Notochord present at some stage |
| C. | Echinodermata | 3. | Segmented body |
| D. | Annelida | 4. | Radial symmetry and water vascular system |
1. A-2, B-1, C-4, D-3
2. A-3, B-1, C-4, D-2
3. A-2, B-4, C-1, D-3
4. A-4, B-1, C-2, D-3
Subtopic: Phylum Porifera | Phylum Annelida | Phylum Echinodermata | Phylum Chordata |
86%
From NCERT
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Consider the given two statements:
| Assertion (A): | Roundworms (phylum Nematoda) are pseudocoelomates. |
| Reason (R): | Pseudocoelom provides protection for internal organs and facilitates movement of nutrients. |
| 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: Basis of Classification |
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