Q. No.In metameric segmentation:
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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I. is derived from embryonic mesoderm.
II. is present on the ventral side during embryonic development in chordates.
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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The given figure shows broad classification of Kingdom Animalia based on common fundamental features. Which of the following can be true based on the information given in the figure?
a.Sponges represent ‘A’
b.‘B’ includes flatworms
c.Animals in ‘C’ are triploblastic
d.Radial symmetry is seen in adults of animals in ‘D’
e.Animals in ‘E’ have a complete digestive system
| 1.only a, c and e | 2.only a, b and e |
| 3.only b and d | 4.only a, c and d |
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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 |
| 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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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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