- 1(current)
Q. No.| 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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Sponges are mostly:
| 1. | Asymmetrical | 2. | Radially symmetrical |
| 3. | Bilateraly symmetrical | 4. | Biradially symmetrical |
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Which of the following is not a feature of Porifera?
1. Exclusively marine animals
2. Presence of a water transport or a canal system
3. Sexes are not separate
4. Internal fertilization and indirect development
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Body having meshwork of cell, internal cavities lined with food filtering flagellated cells and indirect development are the characteristics of phylum:
| 1. | Porifera | 2. | Mollusca |
| 3. | Protozoa | 4. | Coelenterate |
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| 1. | Water enters the sponge body through ostia into a spongocoel from where it goes out through the osculum. |
| 2. | Body is supported by a skeleton made up of spicules or spongin fibres. |
| 3. | Sexes are not separate. |
| 4. | Fertilization is external. |
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| 1. | Choanocyte and helps sponges in movement of water through their canal system |
| 2. | Choanocyte and helps sponges in reproducing asexually under favourable conditions |
| 3. | Cnidocyte and helps sponges in catching their prey by paralyzing them |
| 4. | Colloblast and helps sponges in sticking to a surface |
| I: Most sponges work rather like chimneys: they take in water at the bottom and eject it from the osculum ("little mouth") at the top. II: The inner surface is covered with choanocytes where the wave-like motion of the whip-like flagella drives water through the sponge's body. 1. I is correct and II is incorrect. 2. I is incorrect and II is correct. 3. I is correct and II is also correct. 4. I is incorrect and II is also incorrect. |
 |
| 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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Euplectella [Venus Flower Basket], shown in the figure below, belongs to:
| 1. | Porifera | 2. | Cnidaria |
| 3. | Ctenophora | 4. | Platyhelminthes |
- 1(current)
Q. No.
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