Question : [A] : All body cells continuously obtain useful material from, and dispose of their waste products into the external fluid medium. This is mainly maintained as a constancy and is termed excretion. [R]: This is achieved by constant disposal or excretion of all waste products and refuse, as well as, useless materials from body into ex- ternal environments.

Question : [A] : All body cells continuously obtain useful material fr

1.	Question : [A] : All body cells continuously obtain useful material from, and dispose of their waste products into the external fluid medium. This is mainly maintained as a constancy and is termed excretion. [R]: This is achieved by constant disposal or excretion of all waste products and refuse, as well as, useless materials from body into ex- ternal environments.
Answer» If both A and R are TRUE and R is the CORRECT explanation of A If both A and R are true but R is not the correct explanation of A If A is true and R is false If both A and R are false Answer :D