Here's why:
* Structure: Cells are the smallest unit of life that can exist independently. They have a membrane that encloses them, and they contain various internal structures (organelles) that carry out specific functions.
* Function: Cells perform all the necessary life processes, such as metabolism, growth, and reproduction. Different types of cells have specialized functions within an organism.
While there are smaller components within a cell, like molecules and organelles, they are not considered the basic unit of structure and function for the whole organism.
