Q. Concerning the presence of the nucleus what is the difference between bacterial and animal cells?
Animal cells (cells of living beings of the kingdom Animalia) have an internal membrane that delimits a cell nucleus and thus they are eukaryotic cells, in these cells the genetic material is located within the nucleus. Bacterial cells (cells of living beings of the kingdom Monera) do not have ordered cellular nuclei and so they are prokaryotic cells and their genetic material is found dispersed in the cytosol.