The Progression of Biochemical and Morphological Phases and Events That Occur in a Cell During Successive Cell Replication or Nuclear Replication Events. Canonically the Cell Cycle Comprises the Replication and Segregation of Genetic Material Followed by the Division of the Cell But in Endocycles or Syncytial Cells Nuclear Replication or Nuclear Division May Not Be Followed by Cell Division.
The Biological Process Whose Specific Outcome Is the Progression of a Multicellular Organism Over Time From an Initial Condition (e.g. a Zygote or a Young Adult) to a Later Condition (e.g. a Multicellular Animal or an Aged Adult).
Progression Through the Phases of the Meiotic Cell Cycle in Which Canonically a Cell Replicates to Produce Four Offspring with Half the Chromosomal Content of the Progenitor Cell Via Two Nuclear Divisions.
A Membrane Bounded Organelle of Eukaryotic Cells in Which Chromosomes Are Housed and Replicated. in Most Cells the Nucleus Contains All of the Cell's Chromosomes Except the Organellar Chromosomes and Is the Site of RNA Synthesis and Processing. in Some Species or in Specialized Cell Types RNA Metabolism or DNA Replication May Be Absent.
A Small Dense Body One or More of Which Are Present in the Nucleus of Eukaryotic Cells. It Is Rich in RNA and Protein Is Not Bounded by a Limiting Membrane and Is Not Seen During Mitosis. Its Prime Function Is the Transcription of the Nucleolar DNA Into 45s Ribosomal Precursor RNA the Processing of This RNA Into 5.8s 18s and 28s Components of Ribosomal RNA and the Association of These Components with 5s RNA and Proteins Synthesized Outside the Nucleolus. This Association Results in the Formation of Ribonucleoprotein Precursors; These Pass Into the Cytoplasm and Mature Into the 40s and 60s Subunits of the Ribosome.
Interacting Selectively and Non Covalently with a Histone Protein in Which a Residue Has Been Modified by Methylation. Histones Are Any of a Group of Water Soluble Proteins Found in Association with the DNA of Plant and Animal Chromosomes.