In the history of cell biology, how did Robert Hooke contribute to the development of cell theory?

• A. He proposed that all living cells arise only from pre-existing cells, rejecting spontaneous generation.
• B. He observed thin slices of cork with a microscope and coined the term "cell" to describe the small compartments he saw.
• C. He used electron microscopy to reveal the ultrastructure of membranes and organelles.
• D. He concluded that the nucleus is the control center of the cell after observing it in plant cells.

Answer: (B)