What made the discovery of sales possible?
A. The use of magnifying glasses.
B. The study of viruses and bacteria.
C. The observation of cells by Hooke and Pasteur
D. Invention of the microscope.
A. The use of magnifying glasses.
B. The study of viruses and bacteria.
C. The observation of cells by Hooke and Pasteur
D. Invention of the microscope.