Read the following statements regarding the formulation of the cell theory: (I) Matthias Schleiden, a German zoologist, examined a large number of plants and observed that all plants are composed of different kinds of cells. (II) Theodore Schwann studied different types of animal cells and reported that cells had a thin outer layer. (III) Schwann also concluded, based on his studies on plant tissues, that the presenc

Step-by-step solution

Statement (I) is incorrect because Matthias Schleiden was a German botanist, not a zoologist. Statement (II) is correct. Theodore Schwann (1839), a British zoologist, reported the presence of a thin outer layer (plasma membrane) in animal cells. Statement (III) is correct. Despite being a zoologist, Schwann studied plant tissues and concluded that the cell wall is a unique character of plant cells. Statement (IV) is correct. Rudolf Virchow (1855) modified the hypothesis of Schleiden and Schwann to give the cell the