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Q. No.Physalia (Portuguese man-of-war), Adamsia (Sea anemone), Pennatula (Sea-pen), Gorgonia (Sea-fan) and Meandrina (Brain coral) all belong to:
1.
Sponges
2.
Cnidaria
3.
Mollusca
4.
Echinodermata
Subtopic: Phylum Coelenterata |
91%
From NCERT
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Consider the given two statements:
| Assertion(A): | Muscle tissue is not seen in diploblastic animals. |
| Reason (R): | An undifferentiated layer, mesoglea, is present in between the ectoderm and endoderm in diploblastic animals. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 3. | (A) is True; (R) is False |
| 4. | Both (A) and (R) are False |
Subtopic: Phylum Coelenterata |
From NCERT
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| Statement I: | In Cnidarians, polyp is a sessile and in cylindrical form and medusa is umbrella-shaped and free-swimming. |
| Statement II: | In Cnidarians, polyps produce medusae asexually and medusae form the polyps sexually. |
| 1. | Statement I is correct; Statement II is correct |
| 2. | Statement I is correct; Statement II is incorrect |
| 3. | Statement I is incorrect; Statement II is correct |
| 4. | Statement I is incorrect; Statement II is incorrect |
Subtopic: Phylum Coelenterata |
90%
From NCERT
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Subtopic: Phylum Coelenterata | Phylum Mollusca |
80%
From NCERT
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Amphibians are not characterised by the presence of:
1. Dry skin, with placoid scales
2. Eyelids
3. A tympanum
4. Three-chambered heart
1. Dry skin, with placoid scales
2. Eyelids
3. A tympanum
4. Three-chambered heart
Subtopic: Study of Amphibians |
77%
From NCERT
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Crocodiles:
| I: | have a four chambered heart. |
| II: | are endotherms. |
| 1. | Only I is correct |
| 2. | Only II is correct |
| 3. | Both I and II are correct |
| 4. | Both I and II are incorrect |
Subtopic: Study of Reptilia |
69%
From NCERT
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Ornithorhynchus is:
1. a flightless bird
2. a limbless amphibian
3. an egg laying mammal
4. an extinct reptile that was direct ancestor of mammals
1. a flightless bird
2. a limbless amphibian
3. an egg laying mammal
4. an extinct reptile that was direct ancestor of mammals
Subtopic: Study of Aves & Mammals |
77%
From NCERT
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What structure in molluscs forms the shell and houses the gills?
1. mantle
2. epidermis
3. gastrovascular cavity
4. odontophore
1. mantle
2. epidermis
3. gastrovascular cavity
4. odontophore
Subtopic: Phylum Mollusca |
94%
From NCERT
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| Assertion(A): | Cnidarians and Echinoderms are diploblastic animals. |
| Reason(R): | Cnidarians and Echinoderms lack mesoderm. |
| 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 and (R) is False. |
Subtopic: Phylum Coelenterata | Phylum Echinodermata |
75%
From NCERT
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| Assertion(A): | The physiology of tapeworms is highly simplified. |
| Reason(R): | The reproductive potential of tapeworms is very high. |
| 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 and (R) is True. |
Subtopic: Phylum Platyhelminthes |
61%
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