Single-celled life forms were discovered by Anton Van Leeuwenhoek in__________
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 1674
- Antonie van Leeuwenhoek, a Dutch scientist, discovered single-celled microorganisms, which he called "animalcules," in 1674.
- Using microscopes of his own design and construction, Leeuwenhoek made numerous observations of microorganisms, providing some of the earliest descriptions of bacteria, protozoa, and other microscopic organisms.