- 1(current)
Q. No.An important evolutionary transition that appeared for the first time in Echinoderms is:
| 1. | Bilateral symmetry | 2. | Radial symmetry |
| 3. | Tube within a tube plan | 4. | Endoskeleton |
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A water vascular system is characteristically present in:
| 1. | Annelids | 2. | Porifers |
| 3. | Echinoderms | 4. | Cartilaginous fishes |
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1. They have bilateral symmetry as adults and radial symmetry as larvae.
2. They are triploblastic and coelomates.
3. They possess a well-developed excretory system.
4. They have an incomplete digestive system.
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| 1. | Sea Urchin | 2. | Sea lily |
| 3. | Brittle star | 4. | Brain coral |
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I. It is a hydraulic system used by echinoderms for locomotion, food and waste transportation, and respiration.
II. The system is composed of canals connecting numerous tube feet.
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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- 1(current)
Q. No.
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