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Cellular Biology, as part of the Genomics hierarchy within Zoology and Science, pertains to the study of the fundamental units of life, the cells. It encompasses various aspects such as cell structure, cell division, cell signaling, cell cycle regulation, and cell death. Cellular biologists investigate how cells function and interact with their environment, including how they respond to external stimuli and communicate with other cells. This field is crucial in understanding the intricate mechanisms of living organisms at the most basic level, providing valuable insights into genetics, developmental biology, neurobiology, immunology, and cancer research, among others. As such, Cellular Biology in the hierarchy of Science/Zoology/Genomics represents a vital link between genomic studies and the broader context of life sciences.