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335 BCE
Aristotle
theory on how embryos generate and develop -
Zacharias Jansen
invented the first microscope -
Jan Baptist van Helmont
discovered the process of photosynthesis -
Robert Hooke
first observation of cells; named them -
Anton van Leeuwenhoek
broke down lenses and assembles them into simple microscopes -
JEAN BAPTISTE de LAMARCK
dealt with animal classification and evolution -
Lorenz Oken
speculated the significance of life -
Rene Dutrochet
discovered that "the cell is the fundamental element in the structure of living bodies, forming both animals and plants through juxtaposition. -
Robert Brown
Discovered the nucleus of a cell -
Matthias Schleiden
cofounded cell theory; studied botany- branch of biology that deals with plants -
Albrecht von Roelliker
discovered that eggs and sperm are composed of cells and all humans are formed of cells from beginning to end -
Theodor Schwann
founded modern histology; defined cells as the basic unit of animal structure -
Rudolf Virchow
said that all living cells come from preexisting cells -
Louis Pasteur
ended debate with swan-neck experiment; invented pasteurization
