Which of the following is not correct? (a) Robert Brown discovered the cell. (b) Schleiden and Schwann formulated the cell theory. (c) Virchow explained that cells are formed from pre-existing cells. (d) A unicellular organism carries out its life activities within a single cell.
Option (a) is Correct Robert Hooke was the first person who discovered the cell using his microscope invention. He was the first person to describe the cell in the year 1600s. Robert brown gave his contribution to the discovery of the cell nucleus and cytoplasmic streaming. Option (b) is Incorrect The cell theory was formulated by Schleiden and Schwann. The above stated 'option b' is incorrect because the discovery of cell theory by Schleiden and Schwann is the correct one. Option (c) is Incorrect The cell theory states that the cells are formed from pre-existing cells. The above stated 'option c' is an incorrect option because the Virchow gave his contribution to the cell theory regarding the pre-existing cells is the correct one. Option (d) is Incorrect The plant cell alone posses a rigid and defined cell wall. The above stated 'options d' is an incorrect option because the unicellular organism performing all the functions within a single cell is the correct one. Final Answer Option (a) Robert Brown discovered the cell is correct
