What is Sludge?

What is funicle? What is hilum?

What is activated sludge ?

What happens to activated sludge?

What is matter? what is diffusion?

(A) What is the function of velamen ? (B) What is plerome ? (C) What is quiescent centre ? (D) What is the function of collenchyma ? (E) What is the chemical nature of cuticle ?

What is silviculture ? What are its advantages ? What are its advantages ?

Primary vs Activated Sludge

Which of the following is True/false Sediment which treated with bacterial flocs is called 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 required aeration"),((iv)"A lot of decomposition occurs during formation of primary sludge","Very little decomposition occurs during formation of activated sludge"):}