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  • Help me please, Which one of the following pairs of animals comprises 'Jawless fishes'?

Which one of the following pairs of animals comprises 'Jawless fishes'?

  • Option 1)

    Mackerals and Rohu

  • Option 2)

    Lampreys and hag fishes

  • Option 3)

    Guppies and hag fishes

  • Option 4)

    Lampreys and eels

 

Answers (1)

best_answer

 

Class Cyclostomata -

All are ectoparasites on some fishes. Mouth is circular and jawless. Head and brain poorly developed.

- wherein

Eg. Petromyzon, Myxine.

 

 

Classification of Vertebrata -

It has two divisions and further classes.

1. Division Agnatha (jawless) 

               Class Cyclostomata

2. Division Gnathostomata →

              1. Superclass Pisces (bear fins)   

                       1. Class Chondrichthyes

                       2. Class Osteichthyes

             2. Superclass Tetrapoda (bear limbs)

                       1. Class Amphibia

                       2. Class Reptilia

                       3. Class Aves

                       4. Class Mammals  

-

 Lampreys and hagfishes (myxine ) belongs to class cyclostmata


Option 1)

Mackerals and Rohu

Incorrect

Option 2)

Lampreys and hag fishes

Correct

Option 3)

Guppies and hag fishes

Incorrect

Option 4)

Lampreys and eels

Incorrect

Posted by

prateek

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