Biology · CELL THE UNIT OF LIFE

Consider the following statements regarding the formulation of cell theory: (A) Matthias Schleiden concluded that the presence of cell wall is a unique character of plant cells. (B) Theodore Schwann studied different types of animal cells and observed a thin outer layer known as plasma membrane. (C) Schleiden and Schwann together formulated the cell theory but could not explain how new cells were formed. Which of the above statements are correct?

1. A
   (A) and (B) only
2. B
   (B) and (C) only
3. C
   (A), (B) and (C)
4. D
   (A) and (C) only