What do you mean by carbon dioxide and oxygen as per biology ???? Define their meanings plz ???? I need handwritten ans in a sheet of paper as last time you gave in meritnation platform and difficult to understand plz i need proper ans

Dear Student,

There is nothing to be defined in that. 

They both are gases. They are present in the atmosphere. We inhale/take/breathe oxygen while we exhale/release Carbon dioxide. 



Regards

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