Early Romans discovered that objects could be magnified through the construction and shaping of glass. For the past thousand years, this discovery has led to the construction and design of modern day microscopes. The development of the microscope was used in the 17th and 18th centuries to observe cells and eventually develop “cell theory”. Which of the following is the most basic explanation of “cell theory”? Every object in the universe is made of cells.
Cells are made from atoms during chemical reactions.

All cells are identical.
All living things are made of cells.