Q. No.| 1. | Bilateral symmetry | 2. | Three embryonic layers |
| 3. | Incomplete digestive system | 4. | Coelom |
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The phylum with exclusively marine animals is:
| 1. Porifera | 2. Cnidaria |
| 3. Ctenophora | 4. Platyhelminthes |
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Which of the following is not a feature of Ctenophora?
1. Diploblastic organisms with tissue level of organization
2. Absence of Cnidocytes
3. Presence of internal ciliated comb plates
4. Bio-luminescence well marked in some members
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I. Presence of comb plates on the surface.
II. Bioluminescence
This animal can be:
| 1. A sponge | 2. A Cnidarian |
| 3. A Ctenophore | 4. A flatworm |
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| a: | body bears eight external rows of ciliated comb plates, which help in locomotion. |
| b: | reproduction takes place only by asexual means. |
| c: | digestion is both extracellular and intracellular. |
| d: | sexes are separate. |
| 1. | a and c only | 2. | b and d only |
| 3. | a, b and c only | 4. | a, b and d only |
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Flame cells are excretory structures seen in:
| 1. | Platyhelminthes | 2. | Annelids |
| 3. | Arthropods | 4. | Cnidarians |
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Triploblastic organization, bilateral symmetry but lack of coelom will be seen in:
| 1. | Planaria | 2. | Pheretima |
| 3. | Periplaneta | 4. | Pinctada |
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Statement I: Planaria is a free-living flatworm and possesses high regeneration capacity.
Statement II: Hooks and suckers are present in parasitic flatworms.
1. Statement I is correct and Statement II is incorrect
2. Statement I is incorrect and Statement II is correct
3. Both Statement I and Statement II are correct
4. Both Statement I and Statement II are incorrect
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The structure shown in the given figure helps flatworms in:
1. Catching food and digesting it
2. Exchange of gases
3. Excretion and Osmoregulation
4. Regeneration of lost body parts
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