Life begins at the cellular level. The cell is the basic unit of life, and all living organisms are made up of one or more cells. A single cell can perform all the functions necessary for life, including metabolism, growth, and reproduction.
For example, unicellular organisms, such as bacteria and amoebas, consist of a single cell that carries out all life processes. In multicellular organisms, cells specialize and work together to form tissues and organs, but each cell still retains the characteristics of life.
Therefore, whether it’s a solitary bacterium or a complex animal made up of trillions of cells, the cell is where life truly begins.