In the context of the cell theory, what role do cells play?

Cells play a fundamental role in the context of cell theory, which posits that all living organisms are composed of one or more cells, and that cells are the basic unit of life. This means that cells are the smallest structural and functional units that can carry out the processes necessary for life. They perform essential functions such as metabolism, growth, and response to the environment.

By being the basic unit of life, cells serve as the building blocks for all living organisms, from the simplest single-celled bacteria to complex multicellular organisms, including plants and animals. This foundational concept is crucial for understanding biology, as it highlights the importance of cells not only in structure but also in the function of living organisms.