In the 1800s two scientists, Theodor Schwann and Matthias Schleiden, studied different types of organisms. After many years of studying a great variety of organisms, they drew similar but independent conclusions about their observations. What statement was developed most directly from these conclusions and is part of the modern cell theory?

Cells contain hereditary information.

All living things are composed of cells.

Cells only exist in multicellular organisms.

The functions of living things occur in cells.