Which of the following characteristic features always hold true for the corresponding group of animals?
| (a) | Viviparous | (1) | Mammalia | 
| (b) | Possess a mouth with an upper and a lower jaw | (2) | Chordata | 
| (c) | 3- chambered heart with one incompletely divided ventricle | (3) | Reptilia | 
| (d) | Cartilaginous - Endoskeleton | (4) | Chondrichthyes | 
1. a
2. b
3. c
4. d
Which of the following characteristics is mainly responsible for the diversification of insects on land:
Match the name of the animal (Column I), with one characteristic (Column II), and the phylum/class (Column III) to which it belongs:
| Column I | Column II | Column III | |
| 1. | Ichthyophis | terrestrial | Reptilia | 
| 2. | Limulus | body covered by chitinous exoskeleton | Pisces | 
| 3. | Adamsia | radially symmetrical | Porifera | 
| 4. | Petromyzon | ectoparasite | Cyclostomata | 
Which of the following are correctly matched with respect to their taxonomic classification?
| 1. | Centipede, millipede, spider, scorpion-Insecta | 
| 2. | House fly, butterfly, tsetse fly, silverfish-Insecta | 
| 3. | Spiny anteater, sea urchin, sea cucumber- Echinodermata | 
| 4. | Flying fish, cuttlefish, silverfish- Pisces | 
One of the representatives of the phylum Arthropoda is:
1. Silverfish
2. Pufferfish
3. Flying fish
4. Cuttlefish
In which one of the following the genus name, its two characters and its class/phylum are correctly matched?
| Genus | Two Characters | Class/phylum | 
| (a) Salman dra | (i) A tympanum represents ear (ii) Fertilisation is external | Amphibia | 
| (b) Pteropus | (i) Skin possesses hair (ii) Oviparous | Mammalia | 
| (c) Aurelia | (i) Cnidobles (ii) organ level of Organisation | Coelenterata | 
| (d) Ascaris | (i) Body segmented (ii) Males and Female distinct | Annelida | 
3. (c)
4. (d)