1. | Only I is correct | 2. | Only II is correct |
3. | Both I and II are correct | 4. | Both I and II are incorrect |
1. | Asterias, Echinus, Antedon, and Ophiura |
2. | Balanoglossus, Saccoglossus and Amphioxus |
3. | Pinctada, Aplysia, Dentalium, and Obelia |
4. | Laccifer, Bombyx, Trypanosoma and Periplaneta |
I: | are Cnidarians. |
II: | have a skeleton composed of silica spicules and calcium chloride. |
1. | A rasping tongue like organ in alimentary canal |
2. | Finger like osmoregulatory and excretory structures at the junction of midgut and hindgut |
3. | A water vascular system with tube feet |
4. | A large number of cilia used for locomotion |
I: | They have feathers and most of them can fly. |
II: | They possess beak. |
III: | They have scales on the forelimbs and hindlimbs are modified into wings. |
IV: | They have dry skin without glands except the oil gland at the base of the tail. |
V: | They possess a fully ossified (bony) endoskeleton. |
VI: | They have long bones that are solid without air cavities (pneumatic). |
1. | 3 | 2. | 4 |
3. | 5 | 4. | 6 |
I: | Alimentary canal and reproductive tracts open into a common chamber called cloaca which opens to the exterior but the urinary system has a separate opening to the exterior. |
II: | Respiration is by gills, lungs and through skin. |
1. | Vertebrata is a subphylum; Agnatha is a division and Pisces is a super-class |
2. | Vertebrata is a supraphylum; Agnatha is a phylum and Pisces is a super-class |
3. | Vertebrata is a subphylum; Agnatha is a division and Pisces is a class |
4. | Vertebrata is a subphylum; Agnatha is a super-class and Pisces is a class |