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
Subtopic:  Comparative study of Cartilagenous & Bony Fishes | Class Chondrichthyes |
 75%
From NCERT
NEET - 2016
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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
Subtopic:  Comparative study of Cartilagenous & Bony Fishes | Class Chondrichthyes |
 58%
From NCERT
AIPMT - 2011
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A marine cartilaginous fish that can produce electric current is:

 
1. Pristis 2. Torpedo
3. Trygon 4. Scoliodon
Subtopic:  Comparative study of Cartilagenous & Bony Fishes | Class Chondrichthyes |
 82%
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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
Subtopic:  Comparative study of Cartilagenous & Bony Fishes | Class Chondrichthyes |
 82%
From NCERT
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