Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Rudolf Virchow modified the hypothesis of Schleiden and Schwann to give the cell theory a final shape. Reason (R): The cell theory proposed by Schleiden and Schwann did not explain as to how new cells were formed. In the light of the above statements, choose the most appropriate answer from the opt

Step-by-step solution

Assertion (A) is correct because Rudolf Virchow (1855) modified the hypothesis of Schleiden and Schwann to give the cell theory a final shape. Reason (R) is correct because the original cell theory proposed by Schleiden and Schwann failed to explain how new cells were formed. Reason (R) is the correct explanation of Assertion (A) because it was precisely this limitation (the inability to explain new cell formation) that prompted Virchow to modify the theory by introducing the concept that cells arise from pre-exist