Anton van Leeuwenhoek made an important contribution to the development of the cell theory. How?
a. He articulated the pattern component of the theory-that all organisms are made of cells.
b. He articulated the process component of the theory-that all cells come from preexisting cells.
c. He invented the first microscope and saw the first cell.
d. He invented more powerful microscopes and was the first to describe the diversity of cells.