In ______, ______, a ______ botanist, examined a large number of plants and observed that all plants are composed of different kinds of cells which form the tissues of the plant.
At about the same time, ______ (______), a ______ zoologist, studied different types of animal cells and reported that cells had a thin outer layer which is today known as the ______.
He also concluded, based on his studies on plant tissues, that the ______ is a unique character of the plant cells.
On the basis of this, ______ proposed the hypothesis that the bodies of animals and plants are composed of cells and products of cells.
______ and ______ together formulated the cell theory.
This theory however, did not explain as to how ______ cells were formed.
______ (______) first explained that cells divided and new cells are formed from pre-existing cells (______).
Rudolf Virchow modified the hypothesis of ______ to give the cell theory a final shape.
Cell theory as understood today is: (i) ______ (ii) ______