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