Answer:
See the answer below please.
Step-by-step explanation:
The nucleolus corresponds to a structure present in the nucleus of the cells, where the ribosomal RNA required for the assembly of ribosome units for protein synthesis is synthesized. In mammals 1-5 nucleoli can be observed, they can be observed grouping in the interphase period (phases G1, G2 and S of the cell cycle).
The nucleolus has a spherical shape, is found in all eukaryotic cells (exception: sperm) and is surrounded by dense chromatin.