Final answer:
Development involves changes in shape and cell differentiation, where unspecialized cells become specialized for specific functions in the body. This biological development is a part of growth and repair, reflecting the diversity of cell types in an organism.
Step-by-step explanation:
Development in biological terms refers to the changes in shape as well as the differentiation of cells and tissues. Differentiation is the process by which unspecialized cells become specialized in structure and function to perform specific tasks in the body. Part of the development process also involves changes in the size and metabolic activity as the cells mature into their final forms, which contribute to the overall growth and repair of an organism.
During embryonic development, cells go through a specialization process, allowing them to acquire a distinct shape and function, much like actors reading only their parts from a movie script. These processes are influenced by chemical signals and regulated gene expression, resulting in the diversity of cell types that perform various functions within an organism.