Answer:
The Microscope
Step-by-step explanation:
Antonie van Leeuwenhoek, a Dutch Microscopist made microscope consisting of a single lens (high-quality) of very short focal length. He is known as the Father of Microbiology. He succeeded in making history in Biology by discovering bacteria, vacuole, infusoria, red blood cells and many more. He produced more than 500 optical lenses and created 25 single-lens microscopes.