Final answer:
Robert Hooke discovered cells in 1665 through a microscope.
Step-by-step explanation:
The correct answer is Robert Hooke. In 1665, Robert Hooke observed cells through a microscope and coined the term 'cell' to describe the small compartments he saw in cork. This discovery laid the foundation for the study of cells and cell biology. However, it is worth noting that the first living cells were observed by Anton van Leeuwenhoek, another scientist, who observed microorganisms in pond water.
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