Which one of the following pair of animals comprises 'jawless fishes'?
| 1. | Lampreys and eels |
| 2. | Mackerals and rohu |
| 3. | Lampreys and hagfishes |
| 4. | Guppies and hagfishes |
Match the following columns and select the correct option.
| Column I | Column II | ||
| (a) | 6 - 15 pairs of gill slits | (i) | Trygon |
| (b) | Heterocercal caudal fin | (ii) | Cyclostomes |
| (c) | Air Bladder | (iii) | Chondrichthyes |
| (d) | Poison sting | (iv) | Osteichthyes |
| Options: | (a) | (b) | (c) | (d) |
| 1. | (iii) | (iv) | (i) | (ii) |
| 2. | (iv) | (ii) | (iii) | (i) |
| 3. | (i) | (iv) | (iii) | (ii) |
| 4. | (ii) | (iii) | (iv) | (i) |
A jawless fish, which lays eggs in freshwater and whose ammocoetes larvae after metamorphosis return to the ocean is?
1. Eptratretus
2. Myxine
3. Neomyxine
4. Petromyzon
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 |
Match the following columns and select the correct option :
| Column-I | Column-II | ||
| (a) | Aptenodytes | (i) | Flying fox |
| (b) | Pteropus | (ii) | Angel fish |
| (c) | Pterophyllum | (iii) | Lamprey |
| (d) | Petromyzon | (iv) | Penguin |
| Options: | (a) | (b) | (c) | (d) |
| 1. | (iii) | (iv) | (ii) | (i) |
| 2. | (iii) | (iv) | (i) | (ii) |
| 3. | (iv) | (i) | (ii) | (iii) |
| 4. | (ii) | (i) | (iv) | (iii) |