AP BIOLOGY

Detailed explanation-1: -The third part, which asserts that cells come from preexisting cells that have multiplied, was described by Rudolf Virchow in 1858, when he stated omnis cellula e cellula (all cells come from cells).

Detailed explanation-2: -The third part of the cell theory definition states that all cells come from preexisting cells. This means that cells don’t just appear out of thin air (known as “spontaneous generation”). New cells are always made from current cells.

Detailed explanation-3: -All living organisms are composed of one or more cells. A cell is the basic structural and functional unit of living organisms. All cells arise from pre-existing cells.

Detailed explanation-4: -Part Six: Preexisting Cells It took a third scientist, Rudolf Virchow, to prove that cells did indeed come from other cells. But the research he used to prove this actually came from a German Jewish scientist named Robert Remak!

Detailed explanation-5: -The 3 parts of modern cell theory are: cells pass DNA to new cells, cells of the same species are made of the same stuff, and energy flow happens inside cells. Biologists Schleiden and Schwann first proposed classic cell theory in 1839, and Virchow added to it in 1858.