Question

define nucleus .......!!!!

Answer 1

Nucleus is a dense protoplasmic body that contains hereditary information for controlling cell activities as well as for transfer to next generation.

Answer 2

Nucleus :- That cell organelle which contains genetic material such as RNA or DNA and controlls the entire activity i.e. it helps to perform all the metabollic activities of the cell is known as nucleus......it is also known as brain of cell.
It is one of most important cell organelle.
every organism has nucleus but in prokaryotes no well defined nucleus whereas in eukaryotes there's well defined nucleus .