Choose the correct statement.
All mammals are viviparous.
All cyclostomes do not possess jaws and paired fins.
All reptiles have a three-chambered heart.
All Pisces have gills covered by an operculum.
None
Class Cyclostomata -
All are ectoparasites on some fishes. Mouth is circular and jawless. Head and brain poorly developed.
- wherein
Eg. Petromyzon, Myxine.
Option 1)
All mammals are viviparous.
This is incorrect option
Option 2)
All cyclostomes do not possess jaws and paired fins.
This is correct option
Option 3)
All reptiles have a three-chambered heart.
This is incorrect option
Option 4)
All Pisces have gills covered by an operculum.
This is incorrect option