Respuesta :
Leeuwenhoek discovered single celled organisms, at first called "animalcules", so the answer is C.
Antonie van Leeuwenhoek, the scientist who invented the microscope, discovered that bacteria contain only one cell. Thus, option C is correct.
What is cell theory?
The most important hypothesis that characterizes the living cell and distinguishes multi- and single-celled organisms are cell theory. The animalcules or the single-celled cells were first discovered by Anton Leeuwenhoek.
It was discovered when he observed the sample of his tooth scrapings and saw an organism made of only one cell and were called single-celled bacteria.
Later on, the concept of cells as a fundamental unit of life was proposed, and their significance in activity and function was established.
Therefore, option C. bacteria have one cell contributed to the cell theory.
Learn more about Antonie van Leeuwenhoek here:
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