Cell theory was given by
(a) Schleiden and Schwann
(b) Virchow
(c) Hooke
(d) Haeckel.

Correct Answer: (a) Schleiden and Schwann

Cell theory was first given by Matthias Schleiden and Theodor Schwann.

Extra information:

Cell theory states that living organisms are made up of cells.

The cell is the basic structural, physiological, and organizational unit of life.

All cells come from pre-existing cells.

The three scientists Matthias Schleiden, Theodor Schwann, and Rudolf Virchow contributed to the development of cell theory.