Which statement accurately describes programmed cell death in development?

• A. Certain cells are programmed to die at appropriate times
• B. Cells never die
• C. All cells undergo immediate lysis
• D. Death is caused only by pathogens

Answer: (A)

During development, programmed cell death, or apoptosis, shapes tissues by eliminating specific cells at the right time. This is a controlled, genetically encoded process that allows organs to form correctly—for example, removing cells in the spaces between developing digits or pruning unnecessary neurons. It’s driven by intracellular signaling that activates caspases and leads to orderly changes like cell shrinkage, DNA fragmentation, and phagocytic removal of the cell debris, typically without triggering inflammation. This is why the idea that certain cells are scheduled to die at appropriate times is the best description of programmed cell death in development. The other statements aren’t accurate because death does occur in development, it isn’t a uniform immediate lysis of all cells, and it isn’t caused only by pathogens.