Which of the following characteristic features always hold true for the corresponding group of animals?
1. | Viviparous | (1) | Mammalia |
2. | Possess a mouth with an upper and a lower jaw | (2) | Chordata |
3. | 3-chambered heart with one incompletely divided ventricle | (3) | Reptilia |
4. | Cartilaginous - Endoskeleton | (4) | Chondrichthyes |
What will you look for to identity the sex of the following? Select the correct match.
1. | Male frog – a copulatory pad on the first digit of the hind limb |
2. | Female cockroach – anal cerci |
3. | Male shark – claspers borne on pelvic fins |
4. | Female Ascaris – sharply curved posterior end |
A marine cartilaginous fish that can produce electric current is:
1. | Pristis | 2. | Torpedo |
3. | Trygon | 4. | Scoliodon |
Which one of the following groups of animals is correctly matched with its one characteristic feature without even a single exception?
1. | Reptilia: possess 3 - chambered heart with one incompletely divided ventricle |
2. | Chordata: possess a mouth provided with an upper and lower jaw |
3. | Chondrichthyes: possess cartilaginous endoskeleton |
4. | Mammalia: give birth to young one |