I: | All living members are ectoparasites on some fishes. |
II: | They have an elongated body bearing 6-15 pairs of gill slits for respiration. |
III: | They have a sucking and circular mouth without jaws. |
IV: | Their body has scales and paired fins. |
V: | Circulation is of open type. |
VI: | Cyclostomes are fresh water animals but migrate for spawning to marine water. |
Identify the incorrectly matched pair:
Animals | Feature present in both | |
1. | Balanoglossus and Pinctada | Open circulatory system |
2. | Branchiostoma and Ascidia | Persistent notochord |
3. | Aplysia and Pheretima | True coelom |
4. | Gorgonia and Pennatula | Cnidoblasts |
Animal | Excretory organs | Excretory product | |
1. | Labeo (Rohu) | Nephridial tubes | Ammonia |
2. | Salamander | Kidney | Urea |
3. | Peacock | Kidney | Urea |
4. | Housefly | Renal tubules | Uric acid |