Which one of the following pairs of animals comprises 'Jawless fishes'?
Mackerals and Rohu
Lampreys and hag fishes
Guppies and hag fishes
Lampreys and eels
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