Unicellular microscopic organisms were first studied by:
ARobert Hooke
BPriestley
CPasteur
DLeeuwenhoek
Answer:
D. Leeuwenhoek
Read Explanation:
Leeuwenhoek- Commonly known as “the Father of Microbiology”, Antonie Van Leeuwenhoek was a Dutch businessman and scientist.
He designed his own single-lensed microscope and by using this microscopic design, he for the very first time experimented microbes.
These microbes were initially referred to as ‘dierkens’ by Leeuwenhoek, meaning “small animals” in Dutch.
They were called ‘animalcules’, when translated into English. He was the first to relatively determine their size through his experiments.
These ‘animalcules’ are now mostly referred to as unicellular organisms. Hence, the correct answer is option (D).