Which one of the following groups of animals is correctly matched with its one characteristics feature without even a single exception?

  • Option 1)

    Reptilia: possess 3 - chambered heart with one incompletely divided ventricle

  • Option 2)

    Chordata: possess a mouth provided with an upper and lower jaw

  • Option 3)

    Chondrichthyes: possess cartilaginous endoskeleton

  • Option 4)

    Mammalia: give birth to young one.

 

Answers (1)

 

Class chondrocytes (cartilaginous fish) -

Marine and predaceous. Mouth is located ventrally and teeth are modified, placoid scales directed backwardly. Air bladder is absent.

- wherein

Eg. Torpedo, Scoliodon, Pristis, Petromyzon.

 

 All Chondrichthyes posses cartilaginous exoskeleton without any exception


Option 1)

Reptilia: possess 3 - chambered heart with one incompletely divided ventricle

Incorrect

Option 2)

Chordata: possess a mouth provided with an upper and lower jaw

Incorrect

Option 3)

Chondrichthyes: possess cartilaginous endoskeleton

Correct

Option 4)

Mammalia: give birth to young one.

Incorrect

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