- 1(current)
Q. No.| COLUMN I | COLUMN II | ||
| A | Spongilla | P | Sea-fan |
| B | Euspongia | Q | Brain coral |
| C | Gorgonia | R | Fresh Water sponge |
| D | Meandrina | S | Sea-pen |
| E | Pennatula | T | Bath sponge |
| A | B | C | D | E | |
| 1. | T | R | P | Q | S |
| 2. | R | T | P | Q | S |
| 3. | T | R | Q | S | P |
| 4. | R | T | S | P | Q |
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Regarding the cell shown in the given figure:
| I: The name Cnidaria is derived from this cell |  |
| II: The stinging capsule present in the cell is called as nematode | |
| III: These cells help cnidarians in anchorage, defence and in capturing the prey |
1. While I and II are correct, III is incorrect
2. I, II and III are correct
3. Only II is incorrect
4. Only I is correct
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| 1. | Gastrovascular cavity has a single opening, mouth on hypostome. |
| 2. | Corals are cnidarians and have a skeleton of calcium carbonate. |
| 3. | They exhibit tissue level of organization and are diploblastic. |
| 4. | Digestion is exclusively intracellular. |
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I. Polyp is sessile and cylindrical form as seen in Hydra and Adamsia.
II. Medusa is umbrella-shaped and free swimming form as seen in Aurelia.
| 1. Only I is correct | 2. Only II is correct |
| 3. Both are correct | 4. Both are incorrect |
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| a: | both polyp and medusa forms exist during its life cycle |
| b: | metagenesis, a sort of alternation of generation, is seen |
| c: | polyps produce medusae sexually and medusae form the polyps sexually |
| 1. | only a is correct | 2. | only a and b are correct |
| 3. | only c is correct | 4. | a, b and c are correct |
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| COLUMN I | COLUMN II | ||
| A | Physalia | P | Sea-fan |
| B | Adamsia | Q | Sea anemone |
| C | Pennatula | R | Sea-pen |
| D | Gorgonia | S | Portuguese men of war |
| A | B | C | D | |
| 1. | S | Q | R | P |
| 2. | S | R | Q | P |
| 3. | P | Q | R | S |
| 4. | S | P | Q | R |
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| I: | This type of life cycle is called as metagenesis and it is a sort of alternation of generation. |
| II: | Polyps in the life cycle of cnidarians are haploid and medusae are diploid. |
2. Both I and II are correct but II does not explain I
3. I is correct and II is incorrect
4. I is incorrect and II is correct
- 1(current)
Q. No.
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