CBSENEETClass 9
Who gave the cell theory?
Answer
The cell theory was proposed by Matthias Schleiden and Theodor Schwann, and was later expanded by Rudolf Virchow.
The working
Schleiden
In 1838, the botanist Matthias Schleiden stated that all plants are made of cells.
Schwann
In 1839, the zoologist Theodor Schwann stated that all animals are made of cells and together they gave the cell theory.
Virchow
In 1855, Rudolf Virchow added that all cells arise from pre-existing cells.
Exam point
The modern cell theory states that all living things are made of cells and that the cell is the basic unit of life.
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