Question

define nucleus

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Answer 1

Answer:

nucleus is a membrane-bound organelle that contains the cell's chromosomes. Pores in the nuclear membrane allow for the passage of molecules in and out of the nucleus.

Explanation:

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Answer 2

$A nucleus is a \: \\ membrane-bound organelle \\ that contains the cell's \\ chromosomes. \\ Pores \: in \: the \: nuclear \: \\ membrane \: allow \\ for \: the \: passage \: of \: molecules \: in \\ and \: out \: of \: the \:  nucleus.$