Which term describes the process in which cells become specialized in structure and function?

• A. Differentiation
• B. Histologist
• C. Adipose Tissue
• D. Cartilage

Answer: (A)

Cell differentiation is the process by which cells become specialized in structure and function. Through regulation of gene expression and signaling cues, precursor cells activate specific programs that give rise to distinct cell types with unique shapes and roles. This allows the same genome to produce diverse tissues, such as muscle, nerve, or fat cells, each tailored to its function. In development and in tissue renewal, stem or progenitor cells progressively commit to particular lineages, forming specialized tissues like adipose tissue or cartilage. The other terms don’t describe a process: a histologist studies tissues under a microscope, while adipose tissue and cartilage are tissue types, not processes.