Question

which scientist said all plants are made of cells? *
schwann
virchow
schleiden
van leeuwenhoek

Explanation:

Matthias Jakob Schleiden, a German botanist, concluded that all plants are composed of cells, which was a key - part of the cell theory. Schwann focused on animals, Virchow on cell division, and van Leeuwenhoek was a pioneer in microscopy.

Answer:

C. Schleiden