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Q. About 96 per cent of the mass of every living organism is composed of just six elements including carbon, hydrogen, nitrogen, oxygen,

Rajasthan PMTRajasthan PMT 2010

Solution:

About 98% of the mass of every living organisms including bacterium and human beings is composed of just six elements, ie, carbon (C), hydrogen (H), nitrogen (N), oxygen (O), phosphorus (P) and sulphur (S).