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 |
Animal | Characteristic | Taxon | |
1. | Millipede | Ventral nerve cord | Arachnids |
2. | Sea Anemone | Triploblastic | Cnidaria |
3. | Silverfish | Pectoral and pelvic fins | Chordata |
4. | Duckbilled platypus | Oviparous | Mammalian |
Which one of the following statements is totally wrong about the occurrence of a notochord, while the other three are correct?
1. | It is present throughout life in Amphioxus |
2. | It is present only in larval tails in Ascidians |
3. | It is replaced by the vertebral column in an adult frog |
4. | It is absent throughout life in humans from the very beginning |
Crocodile and Penguin are similar to Whale and Dogfish in which one of the following features?
1. Lay eggs and guard them till they hatch
2. Possess bony skeleton
3. Have gill slits at some stage
4. Possess a solid single-stranded central nervous system