Which statement supports the cell theory?

The statement that new cells are produced by division of existing cells directly supports the cell theory, which is a fundamental principle in biology. Cell theory includes three main concepts:

1. All living organisms are composed of one or more cells.

2. The cell is the basic unit of life.

3. All cells arise from existing cells.

The idea that new cells come from the division of existing cells highlights the process of cell reproduction, which is essential for growth, development, and healing in multicellular organisms. This process is crucial for maintaining biological continuity and demonstrates that cells are not created spontaneously but rather originate from other cells.

In contrast, the other statements do not align with the concepts outlined in the cell theory. The assertion that all cells are the same size is misleading, as cells vary greatly in size depending on their function and organism. The idea that cells can exist without DNA contradicts the notion that DNA is a vital component of all living cells that carries genetic information. Finally, the claim that all cells have the same function is inaccurate, as different cell types have specialized functions that contribute to the organism's overall operation. Thus, the correct understanding of cell division aligns perfectly with the principles of cell theory.