Question

the black rods in this image are single - celled organisms found in a pond. which scientist was the most likely to observe this organism under the microscope first? robert hooke rudolf virchow anton van leeuwenhoek

Explanation:

Robert Hooke is known for observing cork cells and coining the term "cell". Rudolf Virchow contributed to the cell - theory stating that all cells come from pre - existing cells. Anton van Leeuwenhoek was the first to observe single - celled organisms (microorganisms) like bacteria and protozoa using his self - made microscopes.

Answer:

Anton van Leeuwenhoek