Definition: States that all living things are composed of cells, cells are the basic unit of life, and cells come from pre-existing cells.
Example: Combined efforts of Hooke, Leeuwenhoek, Schleiden, Schwann, and Virchow
Term: Type term here

Explaination and

In biology, cell theory is the historic scientific theory. That living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells. Cells are the basic unit of structure in all organisms and also the basic unit of reproduction. The three tenets to the cell theory are as described below: All living organisms are composed of one or more cells. The cell is the basic unit of life.

nucleic acid molecules are incredibly complex, containing the code that guarantees the four different nucleotide units comprise dna, the nucleic acid of interest to the genealogist. and one of four nitrogen-containing molecules called nucleotides