Here's why:
* Cells are the smallest unit that can carry out all the processes of life. This includes things like taking in nutrients, producing energy, eliminating waste, and even reproducing.
* All living organisms are made up of one or more cells. Whether it's a single-celled bacteria or a complex human being, everything is built from this fundamental building block.
* Cells are the basis for all tissues, organs, and organ systems. They work together in organized ways to create more complex structures and functions.
Let me know if you want to learn more about cells or other levels of biological organization!
