In the 1930s, Ernst Ruska built a(n):

A. cytoskeletal matrix
B. electron microscope
C. light microscope
D. phospholipid bilayer

allowing him to image the structures inside a cell.



Answer :

Final answer:

Ernst Ruska built the electron microscope in the 1930s, revolutionizing the observation of cell structures.


Explanation:

Ernst Ruska built an electron microscope in the 1930s, allowing him to image the structures inside a cell. The electron microscope used a beam of electrons instead of light to observe extremely small objects, enabling scientists to see the tiny structures inside cells, individual molecules, and atoms.


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