Which botanist stated all plants are made of cells?

Which botanist stated all plants are made of cells?

• A. Matthias Schleiden
• B. Theodore Schwann
• C. Robert Brown
• D. Robert Hooke

Answer: (A)

Matthias Schleiden argued that all plant tissues are composed of cells, making him the botanist who stated that all plants are made of cells. By examining a wide range of plant specimens under the microscope, he concluded that the cell is the basic unit of plant life and that new cells arise from existing ones. This positioned plants squarely within the overall cell theory, later expanded to animals by Schwann. Hooke is known for coining the term "cell" when first looking at cork, but he did not generalize about all plants. Brown is noted for describing the nucleus, not for declaring that plants are made up of cells.

Matthias Schleiden argued that all plant tissues are composed of cells, making him the botanist who stated that all plants are made of cells. By examining a wide range of plant specimens under the microscope, he concluded that the cell is the basic unit of plant life and that new cells arise from existing ones. This positioned plants squarely within the overall cell theory, later expanded to animals by Schwann. Hooke is known for coining the term "cell" when first looking at cork, but he did not generalize about all plants. Brown is noted for describing the nucleus, not for declaring that plants are made up of cells.