Chromosomes were seen for the first time by

$DNA$ genetic material occurs by itself in lower organisms and combined with proteins as nucleoproteins in higher organisms. The nucleoprotein is organized in higher forms to form

$A$ chromosome having the centromere in the middle is called .......

Who coined the term $chromatin$?

Chromosomes spread in the form of an indistinct network are called:

Protoplasm found inside the nucleus is known as