| List I | List II | ||
| A. | Comb Plate | I. | Porifera |
| B. | Operculum | II. | Chondrichthyes |
| C. | Choanocytes | III. | Ctenophera |
| D. | Gill Slits | IV. | Osteichthyes |
| 1. | Release of sperms in male |
| 2. | Release of ova by female |
| 3. | Other term for fertilization |
| 4. | None of these |
Animals having a built in thermostat to maintain constant body temperature are known as
1. biothermic
2. poikilothermic
3. oligo thermic
4. homeothermic