All scientist

Question 2

Matthias Schleiden (1838)

German botanist

Answer 2

In 1838, Matthias Schleiden, a German botanist, examined a large number
of plants and observed that

all plants are composed of different kinds of cells which form the tissues of the plant

Question 3

Rudolf Virchow (1855)

Answer 3

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:

1. All living organisms are composed of cells and products of cells.
2. All cells arise from pre-existing cells.