1.

List three features that characterise bony fishes.

Answer»
  • These fishes have bony endoskeleton. 
  • The skin is covered by ganoid, cycloid or ctenoid scales. 
  • Gills are covered by an operculum. 
  • They are ammonotelic. 
  • They have mesonephric kidneys. 
  • External fertilization is seen.


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