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Who was the first to observe and describe 'animalcules' using a microscope?
A
Louis Pasteur
B
Joseph Lister
C
Robert Koch
D
Antonie van Leeuwenhoek
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1
Understand the historical context of microbiology and the development of the microscope in the 17th century.
Recognize that the term 'animalcules' refers to tiny living organisms observed under a microscope, which were among the first microscopic life forms seen by humans.
Identify the key figures in early microbiology: Louis Pasteur, Joseph Lister, Robert Koch, and Antonie van Leeuwenhoek.
Recall that Antonie van Leeuwenhoek was the first person to build powerful microscopes and use them to observe and describe 'animalcules' in the late 1600s.
Conclude that Antonie van Leeuwenhoek is credited with the first observation and description of 'animalcules' using a microscope.