Eukaryotes are fundamentally different from prokaryotes because they contain membrane-bound structures called organelles – including a nucleus, which houses the cell's DNA.
The perihypoglossal nuclei (PHN, including nucleus praepositus, nucleus intercalatus, and the nucleus of Roller) and the inferior olivary complex (IOC, including the medial and dorsal accessory olive and the inferior olive) were considered as whole groups.
These features included a large nucleus, globular nuclear shape, appearance of distinct nucleolus, and loss of cellular polarity.
The dense packing of these mononuclear cells includes a high nucleus:cytoplasm ratio that gives a dense basophilic/purple staining under H and E staining conditions.
Unlike all other secondary and tertiary endosymbionts, however, the dinotom endosymbiont maintains a long list of ancestral characters, including a large nucleus and many mitochondria (Tomas et al. 1973; Jeffrey and Vesk 1976; Horiguchi and Pienaar 1991, 1994; Tamura et al. 2005; Pienaar et al. 2007; Takano et al. 2008).
Layers are arranged based on anatomy of early visual pathways, and include a retina, lateral geniculate nucleus, and layered neocortex.
The iPS cells displayed typical ES cell-like morphology, including a high nucleus-to-cytoplasm ratio, prominent nucleoli and clear boundaries among cells.
MiRNAs are initially expressed as primary miRNA (pri-miRNA), which are apparently transcribed by RNA polymerase II, in the cell nucleus, and include a cap and poly(A) tail.
The IVD is structurally an avascular tissue that includes an inner nucleus pulposus (NP) surrounded by an outer annulus fibrosus (AF), which is sandwiched between the cartilaginous endplates of contiguous vertebral bodies.
Encyclopædia Britannica, Inc. Eukaryotic cells contain membrane-bound organelles, including a clearly defined nucleus, mitochondria, chloroplasts (unique to plant cells), a Golgi apparatus, an endoplasmic reticulum, lysosomes, and peroxisomes.
