(A) Louis Pasteur
(B) Mendel
(C) Leeuwenhoek
(D) None of these
🧠 Explanation:
- Antonie van Leeuwenhoek was the first to observe microorganisms using a microscope.
- He referred to these tiny organisms as "animalcules" in the 17th century.
- His discoveries laid the foundation for microbiology as a science.
- He used handcrafted microscopes that magnified up to 275 times.
Correct Answer: (C) Leeuwenhoek
