Which of the following characteristic features always holds true for the corresponding group of animals?

  • Option 1)

    Cartilaginous endoskeleton

    Chondrichthyes

     

  • Option 2)

    Viviparous

    Mammalia

     

  • Option 3)

    Possess a mouth with an upper and a lower jaw

    Chordata

     

  • Option 4)

    3-chambered heart with one incompletely divided ventricle

    Reptilia

     

 

Answers (1)

 

Heart in reptilia -

Usually 3-chambered but four chambered in crocodiles.

-

 

 Reptiles have 3-chambered heart except for crocodiles.

 Mammals are viviparous except prototherian mammals.


Option 1)

Cartilaginous endoskeleton

Chondrichthyes

 

Correct

Option 2)

Viviparous

Mammalia

 

Incorrect

Option 3)

Possess a mouth with an upper and a lower jaw

Chordata

 

Option 4)

3-chambered heart with one incompletely divided ventricle

Reptilia

 

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