Matching Pairs 4.4 Cell TheoryOnline version History and Basic concepts of cell theory by Susana Montealegre 1 Postulate 2 The cell is the structural unit and the _______ 2 Postulate 1: All the organisms ..... 3 Postulate 3: All cells come from ________ 4 I conclude after studying plant tissues that all plants are made up of cells. 5 He said that all cells are produced by dividing existing cells. 6 Scientist who observed cells in cork for the first time. He calls them celle. 7 He was the first scientist to observe live microorganisms. 8 He said that all animal tissues are composed of cells