Cells consist of many organelles, yet we do not call any of these organelles as structural and functional unit of living organisms

Cells consist of many organelles, yet we do not call any of these organelles as structural and functional unit of living organisms. Explain.

Answer:
Although cell organelles have specific structures and perform specific functions but they cannot be called structural and functional units of living organisms. This is so because they can perform their functions only when they are within a living cell. They cannot function outside the cell as an independent unit.