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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

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prateek

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