1.

List the characteristic features that distinguish cartilaginous fishes with living jawless fishes.

Answer»

Cartilaginous Fishes: 

  • These have powerful jaws which help in predation.
  • These are free living predatory fishes.
  • These are advanced over jawless fishes. 
  • These have a tough skin covered by dermal
  • Respiration is by lamelliform gills without operculum. 
  • Paired fins are present. 
  • Fertilization is internal 
  • Viviparous e.g. Scoliodon


Discussion

No Comment Found