What is a deme ?

(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 magnetism and what is magnet ?

What is Penicillin? What is it used for?

What is gangue and what is concentration?

What is Fermentation? What are the uses of it?

What is matter? What is it made of?

What is a soap, what for is it used ?

What is Haemophilla? What are the causes for it?