Differentiate between:Primary sludge and activated sludge

Study the given differences between primary sludge and activated sludge and select the incorrect ones. Primary Sludge Activated sludge (i) It is sludge formed during primary sewage treatment. It is sludge formed during secondary sewage treatment. (ii) It possesses flocs of decomposer microbes. It does not possess flocs of decomposer microbes. (iii) It does not require aeration. Formation of activated sludge requires aeration. (iv) A lot of decomposition occurs during formation of primary sludge. Very little decomposition occurs during formation of activated sludge.

Differentiate between cartilage and bone.

Differentiate between : Broilers and layers

Differentiate between : Ovipary and Vivipary

Differentiate between piamater and duramater

Differentiate between Parasite and Saprophyte

What is activated sludge ?

Differentiate between : Primary sex organ and secondary sex orgen