what is a deme ?

What is magnetism and what is magnet ?

(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 matter? What is it made of?

What is A^0 , what is its use and what is it's amount?

What is Penicillin? What is it used for?

What are trichomes and what is their function?

What are plasmodesmata and what is their role?