Q. No.1. have tissues like nerve and muscle.
2. reproduce exclusively by sexual method.
3. are multicellular.
4. exhibit same pattern of organization of cells.
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| Statement I: | Sponges exhibit a cellular level of organization. |
| Statement II: | Cnidarians have a tissue level of organization. |
1. Statement I is correct but Statement II is incorrect.
2. Both Statement I and Statement II are correct.
3. Both Statement I and Statement II are incorrect.
4. Statement I is incorrect but Statement II is correct.
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| I. | Platyhelminthes | II. | Mollusca | III. | Annelida |
| 1. | Only I | 2. | Only II |
| 3. | Only II and III | 4. | I, II, and III |
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| 1. | An open circulatory system | 2. | A closed circulatory system |
| 3. | A lymphatic system | 4. | A portal circulation |
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| 1. | Bilateral symmetry | 2. | Three embryonic layers |
| 3. | Incomplete digestive system | 4. | Coelom |
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| 1. | Ectoderm | 2. | Mesoderm |
| 3. | Endoderm | 4. | Gastroderm |
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| I: | Bilateral symmetry is the body plan where the body of the animal can be divided into two identical halves through any plane passing through the central axis of the body. |
| II: | While Ctenophores and adult Echinoderms have bilateral symmetry, Annelida and Arthropods have radial symmetry. |
1. Statement I is correct but Statement II is incorrect.
2. Both Statement I and Statement II are correct.
3. Both Statement I and Statement II are incorrect.
4. Statement I is incorrect but Statement II is correct.
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| I: | This is seen in sponges, cnidarians, ctenophores and larval echinoderms. |
| II: | This type of body symmetry is generally seen in animals which move actively in their environment. |
| 1. Only I | 2. Only II |
| 3. Both I and II | 4. Neither I nor II |
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Consider the given features:
| A: | Body cavity lined by mesoderm |
| B: | The mesoderm present as scattered pouches in between the ectoderm and the endoderm |
Select the correct option of animals having the features A and B:
| A | B | |
| 1. | Aschelminthes | Annelids |
| 2. | Platyhelminthes | Ctenophores |
| 3. | Arthropods | Molluscs |
| 4. | Arthropods | Aschelminthes |
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I. The body is divided into segments only externally.
II. There is a serial repetition of at least some organs.
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
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