Cell Division and Cell Theory — NEET Biology
📚 Practice ConceptSchleiden and Schwann together formulated the cell theory. This theory however, did not explain as to how new cells were formed. Rudolf Virchow (1855) first explained that cells divided and new cells are formed from pre-existing cells (Omnis cellula-e cellula). He modified the hypothesis of Schleiden and Schwann to give the cell theory a final shape. Cell theory as understood today is:
Which of the following statements regarding the development of cell theory and early cell discoveries are correct? S1: Antonie Von Leeuwenhoek first described the nucleus in 1831, while Robert Brown first saw and described a live cell. S2: Matthias Schleiden, a German botanist, observed that all plants are composed of different kinds of cells which form the tissues of the plant. S3: Theodore Schwann proposed that the presence of a cell wall is a unique character of animal cells based on his studies. S4: The initial cell theory formulated by Schleiden and Schwann explicitly explained that new cells are formed from pre-existing cells. S5: Rudolf Virchow modified the cell theory by stating "Omnis cellula-e cellula", meaning all cells arise from pre-existing cells.
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