Which term describes the basic unit of life?

• A. The Organ
• B. The Cell
• C. The Tissue
• D. The Organ System

Answer: (B)

Cell is the basic unit of life. A cell is the smallest unit capable of performing all life processes, including metabolism, growth, response to the environment, and reproduction. In living organisms, cells come together to form tissues, tissues make up organs, and organs work together in organ systems, showing how life is organized from simple units to complex structures. Different cell types exist (like bacteria as simpler cells and plant/animal cells as more complex), but the cell itself is the fundamental unit that defines living matter.