What are the basic unit of life?

Cells are considered the basic unit of life because they are the smallest structural and functional units in all living organisms. Every organism, whether unicellular or multicellular, is composed of cells. In multicellular organisms, cells work together to form tissues, which in turn form organs, and further combine to create organ systems. Each cell can carry out essential life functions such as metabolism, growth, and reproduction, and it contains the necessary components, such as DNA, that encode the genetic information vital for life. This foundational role of cells distinguishes them as the fundamental units from which all living things are built, highlighting their significance in biology and the study of life. Understanding the cell's role is crucial for delving deeper into more complex organizational levels in biological systems.