Assertion: nucleus's structure | /r/HasProperty | dense
Facets:
Source sentences:
text: It contains a dense structure called the Nucleolus and is surrounded by the Nuclear Envelope, a structure composed of two membranes, seperated by fluid, which contain a number of nuclear pores that can allow relatively large molecules through.
text: Instead, it is combined with proteins and organized into a precise, compact structure, a dense string-like fiber called chromatin.