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Q. No.Consider the following statements:
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 |
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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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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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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