Which scientist invented the very first optical microscopes and was also the first person to view single-celled organisms living in pond water?

Question

Responses
A Robert HookeRobert Hooke
B Theodor SchwannTheodor Schwann
C Mattias SchleidenMattias Schleiden
D Anton Von Leeuwenhoek

Answer 1

The correct answer is D. Anton Von Leeuwenhoek. He invented some of the earliest optical microscopes and was the first person to observe and describe single-celled organisms, which he referred to as "animalcules," in pond water.