Question

which scientists observations directly supported the idea that all plants are made of cells, contributing to the development of cell theory?
robert hooke
matthias schleiden
antonie van leeuwenhoek
rudolf virchow

Explanation:

Matthias Schleiden, a German botanist, studied plant tissues and concluded that all plants are composed of cells, which was a key contribution to cell - theory. Robert Hooke first described cells but not specifically the idea that all plants are made of cells. Antonie van Leeuwenhoek made important discoveries about microorganisms. Rudolf Virchow contributed to the cell - theory with the idea that cells come from pre - existing cells.

Answer:

B. Matthias Schleiden