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