The amount of oxygen required by the microbes in the decompositionn of organic matter is called

The amount of oxygen required by the microbes in the decomposition of organic matter is called :

The amount of oxygen required by the microbes in the decomposition of organic matter is called :

Fully decomposed organic matter is called :

Undecomposed organic matter is called

Decomposed organic matter in soil is called :

Decomposed organic matter in soil is called :

Assertion (A) : The lower the concentration of DO , the the more polluted is the water sample. Reason (R) : Oxygen is consumed by microbes for the decomposition of organic matter present in water.

The amount of oxygen required by bacteria to break down the organic matter present in a certain volume of a sample of water is called BIOCHEMICAL OXYGEN DEMAND (BOD). Which of the following statements are correct ?