The 1st and 2nd part were based on a conclusion made by Schwann and Matthias Schleiden in 1838. The 3rd part was described by Rudolf Virchow in 1858,
Do you understand?
The classical cell theory was proposed by Theodor Schwann in 1839. There are three parts to this theory. 1. All organisms are made of cells.2. Cells are the structural and organizational unit of life.3. All cells come from pre-existing cells.
Yes!, Mam
Okay!, Who proposed the principles of the cell theory John?
I'm just kidding ma'am!, can you repeat the lesson?