what is the diffrence between pisces …

 Pisces :

● This class compromises of fishes which are aquatic, free living and develop system level of organisation.

● They are bilaterally symmetrical and contain three germ layers - endoderm, mesoderm and ectoderm ( Triploblastic ).

● They are coelomate and locomotion occurs through streamlined body and forelimbs modified into fins.

● Respiration occurs through gills. Heart is 2 chambered containing 1 auricle and 1 ventricle.

● Exoskeleton is in form of rough scales. While inmer body is made up of cartilage and bones.

● They are cold - blooded and can't control their body temperature. The reproduction occurs sexually. Sexes are seperate and they lay eggs.

Eg = Catla ( Catla ), Electric Ray ( Torpede ), dog fish ( Scolidon ), Rohu ( Labeo ), Flying fish ( Exocoetus ).
 

Reptilia :

● This class compromises of organism which are aquaticnor terristial, free living and develop system level of organisation.

● They are bilaterally symmetrical and contain three germ layers - endoderm, mesoderm and ectoderm ( Triploblastic ).

● They are coelomate and locomotion occurs through pentadactyle. The heart is three chambered with 2 auricle and 1 ventricle.

● The exoskeleton us made up of scales where as endoskeleton of bones.

● Respiration takes place due to presence of lunges.

● They are cold blooded organism.

● They reproduce sexually where their eggs contain extra embryonic membranes.

Eg. =Magur ( Crocoldilus ), wall lizard ( Hemidactylus ), Trotoise ( Testudo ) and Garden lizard ( Chameleon ).