Breathing and Exchange of GasesHard
Question
Characteristic of class insecta is :-
Options
A.Cephalothorax, book lungs and chitinous exoskeleton
B.Head, thorax & abdomen, tracheal system and chitinous exoskeleton
C.Head & thorax, biramous appendages and book lungs
D.Cephalothorax, biramous appendages and gills
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